Broadcast receiving apparatus and method of processing transmission waves

ABSTRACT

A broadcast receiving apparatus includes: a tuner configured to receive a transmission wave in which identification information is stored in a carrier, the carrier being modulated differently from a data carrier, a frequency band when the transmission wave is transmitted in an air being able to be identified by the identification information; and a controller. The controller is configured to identify a frequency band when the transmission wave is transmitted in the air by using the identification information contained in transmission wave received by the tuner.

CROSS REFERENCE TO RELATED APPLICATIONS

This is a Continuation of U.S. patent application Ser. No. 17/054,997,filed on Feb. 8, 2021, which is the U.S. National Phase under 35 U.S.C.§ 371 of International Application No. PCT/JP2019/018997, filed on May13, 2019, which claims the benefits of Japanese Application No.2018-112514, filed on Jun. 13, 2018, Japanese Application No.2018-095078, filed on May 17, 2018, Japanese Application No.2018-094899, filed on May 16, 2018, and Japanese Application No.2018-093602, filed on May 15, 2018, the entire contents of which arehereby incorporated by reference.

TECHNICAL FIELD

The present invention relates to a broadcast transmission technique or abroadcast reception technique.

BACKGROUND ART

A digital broadcasting service has been started in each country sincethe latter half of the 1990s in place of a conventional analogbroadcasting service. The digital broadcasting service realizedimprovement of broadcasting quality using an error correction technique,multi-channel and HD (High Definition) using a compression codingtechnique, and multimedia of a service using a BML (Broadcast MarkupLanguage) or HTML5 (Hyper Text Markup Language version 5).

In recent years, for the purpose of further improvement of a frequencyusage efficiency, higher resolution, and higher functionality,consideration of an advanced digital broadcasting method is caused toproceed in each country.

RELATED ART DOCUMENTS Patent Documents

-   Patent document 1: Japanese Patent Application Publication No.    2016-14420

SUMMARY OF THE INVENTION Problems to be Solved by the Invention

More than ten years have already passed since the service of theexisting digital broadcasting was started, and broadcast receivingapparatuses capable of receiving an existing digital broadcastingservice are widespread sufficiently. For this reason, it is necessary toconsider compatibility with the existing digital broadcasting servicewhen an advanced digital broadcasting service, which is currentlyconsidered, is to be started. Namely, it is preferable that UHD (UltraHigh Definition) of a video signal is realized while maintaining viewingenvironment of the existing digital broadcasting service.

There is a system described in Patent document 1 as a technique forrealizing UHD broadcasting in the digital broadcasting service. However,the system described in Patent document 1 is one by which the existingdigital broadcasting is replaced, and does not take into considerationthe maintenance of the viewing environment of the existing digitalbroadcasting service.

It is an object of the present invention to a technique for transmittingor receiving a higher functional advanced digital broadcasting servicemore suitably in consideration of compatibility with an existing digitalbroadcasting service.

Means for Solving the Problem

Techniques described in the following claims are used as means forsolving the problem.

As one example, a broadcast receiving apparatus may be configured so asto include: a tuner configured to receive a transmission wave in whichidentification information is stored in a carrier, the carrier beingmodulated differently from a data carrier, a frequency band when thetransmission wave is transmitted in an air being able to be identifiedby the identification information; and a controller. In this case, thecontroller may be configured to identify a frequency band when thetransmission wave is transmitted in the air by using the identificationinformation contained in transmission wave received by the tuner.

Effects of the Invention

According to the present invention, it is possible to provide atechnique for transmitting or receiving an advanced digital broadcastingservice more suitably.

BRIEF DESCRIPTIONS OF THE DRAWINGS

FIG. 1 is a system configuration diagram of a broadcasting systemaccording to one embodiment of the present invention;

FIG. 2A is a block diagram of a broadcast receiving apparatus accordingto one embodiment of the present invention;

FIG. 2B is a detailed block diagram of a first tuner/demodulator in thebroadcast receiving apparatus according to one embodiment of the presentinvention;

FIG. 2C is a detailed block diagram of a second tuner/demodulator in thebroadcast receiving apparatus according to one embodiment of the presentinvention;

FIG. 2D is a detailed block diagram of a third tuner/demodulator in thebroadcast receiving apparatus according to one embodiment of the presentinvention;

FIG. 2E is a detailed block diagram of a fourth tuner/demodulator in thebroadcast receiving apparatus according to one embodiment of the presentinvention;

FIG. 2F is a detailed block diagram of a first decoder in the broadcastreceiving apparatus according to one embodiment of the presentinvention;

FIG. 2G is a detailed block diagram of a second decoder in the broadcastreceiving apparatus according to one embodiment of the presentinvention;

FIG. 2H is a software configuration diagram of the broadcast receivingapparatus according to one embodiment of the present invention;

FIG. 3A is a configuration diagram of a broadcast station serveraccording to one embodiment of the present invention;

FIG. 3B is a configuration diagram of a service provider serveraccording to one embodiment of the present invention;

FIG. 4A is a diagram for explaining a segment configuration for digitalbroadcasting according to one embodiment of the present invention;

FIG. 4B is a diagram for explaining layer allocation in layertransmission for the digital broadcasting according to one embodiment ofthe present invention;

FIG. 4C is a diagram for explaining a generating process for an OFDMtransmission wave for the digital broadcasting according to oneembodiment of the present invention;

FIG. 4D is a diagram for explaining a basic configuration of atransmission path coder for the digital broadcasting according to oneembodiment of the present invention;

FIG. 4E is a diagram for explaining an OFDM type segment parameter forthe digital broadcasting according to one embodiment of the presentinvention;

FIG. 4F is a diagram for explaining a transmission signal parameter forthe digital broadcasting according to one embodiment of the presentinvention;

FIG. 4G is a diagram for explaining arrangement of a pilot signal of asynchronous modulation segment for the digital broadcasting according toone embodiment of the present invention;

FIG. 4H is a diagram for explaining arrangement of a pilot signal of adifferential modulation segment for the digital broadcasting accordingto one embodiment of the present invention;

FIG. 5A is a diagram for explaining bit allocation of a TMCC carrier forthe digital broadcasting according to one embodiment of the presentinvention;

FIG. 5B is a diagram for explaining bit allocation of TMCC informationfor the digital broadcasting according to one embodiment of the presentinvention;

FIG. 5C is a diagram for explaining transmission parameter informationof the TMCC information for the digital broadcasting according to oneembodiment of the present invention;

FIG. 5D is a diagram for explaining system identification of the TMCCinformation for the digital broadcasting according to one embodiment ofthe present invention;

FIG. 5E is a diagram for explaining a carrier modulation mapping methodof the TMCC information for the digital broadcasting according to oneembodiment of the present invention;

FIG. 5F is a diagram for explaining frequency converting processidentification of the TMCC information for the digital broadcastingaccording to one embodiment of the present invention;

FIG. 5G is a diagram for explaining physical channel numberidentification of the TMCC information for the digital broadcastingaccording to one embodiment of the present invention;

FIG. 5H is a diagram for explaining one example of main signalidentification of the TMCC information for the digital broadcastingaccording to one embodiment of the present invention;

FIG. 5I is a diagram for explaining 4K signal transmission layeridentification of the TMCC information for the digital broadcastingaccording to one embodiment of the present invention;

FIG. 5J is a diagram for explaining additional layer transmissionidentification of the TMCC information for the digital broadcastingaccording to one embodiment of the present invention;

FIG. 6A is a diagram for explaining bit allocation of an AC signal forthe digital broadcasting according to one embodiment of the presentinvention;

FIG. 6B is a diagram for explaining configuration identification of theAC signal for the digital broadcasting according to one embodiment ofthe present invention;

FIG. 6C is a diagram for explaining seismic motion warning informationof the AC signal for the digital broadcasting according to oneembodiment of the present invention;

FIG. 6D is a diagram for explaining signal identification of the seismicmotion warning information of the AC signal for the digital broadcastingaccording to one embodiment of the present invention;

FIG. 6E is a diagram for explaining seismic motion warning detailedinformation of the seismic motion warning information of the AC signalfor the digital broadcasting according to one embodiment of the presentinvention;

FIG. 6F is a diagram for explaining the seismic motion warning detailedinformation of the seismic motion warning information of the AC signalfor the digital broadcasting according to one embodiment of the presentinvention;

FIG. 6G is a diagram for explaining additional information regarding atransmission control of a modulation wave of the AC signal for thedigital broadcasting according to one embodiment of the presentinvention;

FIG. 6H is a diagram for explaining transmission parameter additionalinformation of the AC signal for the digital broadcasting according toone embodiment of the present invention;

FIG. 6I is a diagram for explaining an error correcting method of the ACsignal for the digital broadcasting according to one embodiment of thepresent invention;

FIG. 6J is a diagram for explaining an NUC form of the AC signal for thedigital broadcasting according to one embodiment of the presentinvention;

FIG. 7A is a diagram for explaining a dual-polarized transmission methodaccording to one embodiment of the present invention;

FIG. 7B is a system configuration diagram of the broadcasting systemusing the dual-polarized transmission method according to one embodimentof the present invention;

FIG. 7C is a system configuration diagram of the broadcasting systemusing the dual-polarized transmission method according to one embodimentof the present invention;

FIG. 7D is a diagram for explaining a frequency converting processaccording to one embodiment of the present invention;

FIG. 7E is a diagram for explaining a configuration of a pass-throughtransmission method according to one embodiment of the presentinvention;

FIG. 7F is a diagram for explaining a pass-through transmission bandaccording to one embodiment of the present invention;

FIG. 7G is a diagram for explaining a configuration of the pass-throughtransmission method according to one embodiment of the presentinvention;

FIG. 7H is a diagram for explaining the pass-through transmission bandaccording to one embodiment of the present invention;

FIG. 7I is a diagram for explaining the pass-through transmission bandaccording to one embodiment of the present invention;

FIG. 8A is a diagram for explaining a layered division multiplexingtransmission method according to one embodiment of the presentinvention;

FIG. 8B is a system configuration diagram of the broadcasting systemusing the layered division multiplexing transmission method according toone embodiment of the present invention;

FIG. 8C is a diagram for explaining a frequency conversion amplificationprocess according to one embodiment of the present invention;

FIG. 9A is a diagram for explaining a protocol stack of an MPEG-2 TS;

FIG. 9B is a diagram for explaining names and functions of tables usedin the MPEG-2 TS;

FIG. 9C is a diagram for explaining names and functions of the tablesused in the MPEG-2 TS;

FIG. 9D is a diagram for explaining names and functions of descriptorsused in the MPEG-2 TS;

FIG. 9E is a diagram for explaining names and functions of descriptorsused in the MPEG-2 TS;

FIG. 9F is a diagram for explaining names and functions of descriptorsused in the MPEG-2 TS;

FIG. 9G is a diagram for explaining names and functions of descriptorsused in the MPEG-2 TS;

FIG. 9H is a diagram for explaining names and functions of descriptorsused in the MPEG-2 TS;

FIG. 9I is a diagram for explaining names and functions of descriptorsused in the MPEG-2 TS;

FIG. 10A is a diagram for explaining a protocol stack in a broadcasttransmission path of MMT;

FIG. 10B is a diagram for explaining the protocol stack in acommunication line of the MMT;

FIG. 10C is a diagram for explaining names and functions of tables usedin TLV-SI of the MMT;

FIG. 10D is a diagram for explaining names and functions of descriptorsused in the TLV-SI of the MMT;

FIG. 10E is a diagram for explaining names and functions of messagesused in MMT-SI of the MMT;

FIG. 10F is a diagram for explaining names and functions of tables usedin the MMT-SI of the MMT;

FIG. 10G is a diagram for explaining names and functions of descriptorsused in the MMT-SI of the MMT;

FIG. 10H is a diagram for explaining names and functions of descriptorsused in the MMT-SI of the MMT;

FIG. 10I is a diagram for explaining names and functions of descriptorsused in the MMT-SI of the MMT;

FIG. 10J is a diagram for explaining a relation between datatransmission of an MMT method and respective tables;

FIG. 11A is an operation sequence diagram of a channel setting processby a broadcast receiving apparatus 100 according to one embodiment ofthe present invention;

FIG. 11B is a diagram for explaining a data structure of a networkinformation table;

FIG. 11C is a diagram for explaining a data structure of a terrestrialdelivery system descriptor;

FIG. 11D is a diagram for explaining a data structure of a service listdescriptor;

FIG. 11E is a diagram for explaining a data structure of a TSinformation descriptor;

FIG. 12A is an appearance diagram of a remote controller according toone embodiment of the present invention; and

FIG. 12B is a diagram for explaining banner display at the time ofchannel selection according to one embodiment of the present invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Hereinafter, an example of an embodiment of the present invention willbe described with reference to the drawings.

First Embodiment

[System Configuration]

FIG. 1 is a system configuration diagram illustrating one example of aconfiguration of a broadcasting system.

The broadcasting system is configured by, for example, a broadcastreceiving apparatus 100 and an antenna 200, a radio tower 300 and abroadcast station server 400 of a broadcast station, a service providerserver 500, a mobile phone communication server 600 and a base station600B for a mobile phone communication network, a portable informationterminal 700, and a broadband network 800 such as the Internet and arouter device 800R. Further, various kinds of server apparatuses andcommunication equipment may further be connected to the Internet 800.

The broadcast receiving apparatus 100 is a television receiver providedwith a receiving function for an advanced digital broadcasting service.The broadcast receiving apparatus 100 may further include a receivingfunction for an existing digital broadcasting service. Moreover, thebroadcast receiving apparatus 100 is compatible with abroadcasting/communication cooperation system that combines acquisitionof additional content via a broadband network, arithmetic processing bya server apparatus, a presenting process by cooperation with portableterminal equipment, and the like with the digital broadcasting serviceby linking functions using the broadband network to the digitalbroadcasting service (the existing digital broadcasting service or theadvanced digital broadcasting service). The broadcast receivingapparatus 100 receives a digital broadcasting wave sent out from theradio tower 300 via the antenna 200. The digital broadcasting wave maydirectly be transmitted from the radio tower 300 to the antenna 200, ormay be transmitted via a broadcast satellite or a communicationsatellite (whose illustration is omitted). A broadcasting signalretransmitted by a cable television station may be received via a cableline or the like. Further, the broadcast receiving apparatus 100 can beconnected to the Internet 800 via the router device 800R, and cantransmit and receive data by communication with each server apparatus onthe Internet 800.

The router device 800R is connected to the Internet 800 with wirelesscommunication or wired communication; is connected to the broadcastreceiving apparatus 100 with wired communication; and is connected tothe portable information terminal 700 with wireless communication. Thismakes it possible to mutually execute transmission and reception of dataamong each server apparatus on the Internet 800, the broadcast receivingapparatus 100, and the portable information terminal 700 via the routerdevice 800R. The router device 800R, the broadcast receiving apparatus100, and the portable information terminal 700 constitute a LAN (LocalArea Network). Note that communication between the broadcast receivingapparatus 100 and the portable information terminal 700 may be executeddirectly by a method such as BlueTooth (registered trademark) or NFC(Near Field Communication) without the router device 800R.

The radio tower 300 is a broadcasting facility of the broadcast station,and sends out the digital broadcasting wave including various kinds ofcontrol information and content data of a broadcasting program (such asmoving image content or audio content) according to the digitalbroadcasting service. Further, the broadcast station includes thebroadcast station server 400. The broadcast station server 400 storesmetadata such as content data of broadcasting programs and programtitles of the respective broadcasting programs, program IDs, programsummaries, casts, broadcasting dates, or the like. The broadcast stationserver 400 provides the content data or the metadata with a serviceprovider on the basis of a contract. Provision of the content data andthe metadata to the service provider is executed through an API(Application Programming Interface) included in the broadcast stationserver 400.

The service provider server 500 is a server apparatus that the serviceprovider prepares for providing a service by thebroadcasting/communication cooperation system. The service providerserver 500 executes storage, management, distribution, and the like ofthe content data and the metadata provided from the broadcast stationserver 400 and content data and applications (such as at least one ofoperating program or various kinds of data) created for thebroadcasting/communication cooperation system. Further, the serviceprovider server 500 also has a function to execute search of providableapplications or provision of a list in response to an inquiry from thetelevision receiver. Note that different server apparatuses mayrespectively execute storage, management, and distribution of thecontent data and the metadata, and storage, management, and distributionof the applications. The broadcast station may be the same as theservice provider, or may be a different provider. A plurality of serviceprovider servers 500 may respectively be prepared for differentservices. Further, the broadcast station server 400 may be combined withthe functions of the service provider server 500.

The mobile phone communication server 600 is connected to the Internet800, and is also connected to the portable information terminal 700 viathe base station 600B. The mobile phone communication server 600 managestelephone communication (telephone call), and transmission and receptionof data via the mobile phone communication network of the portableinformation terminal 700, and allows transmission and reception of databy communication between the portable information terminal 700 and eachserver apparatus on the Internet 800. Note that the communicationbetween the portable information terminal 700 and the broadcastreceiving apparatus 100 may be executed via the base station 600B, themobile phone communication server 600, the Internet 800, and the routerdevice 800R.

[Hardware Configuration of Broadcast Receiving Apparatus]

FIG. 2A is a block diagram illustrating one example of an internalconfiguration of the broadcast receiving apparatus 100.

The broadcast receiving apparatus 100 is configured by a main controller101, a system bus 102, a ROM 103, a RAM 104, a storage (accumulator)110, a LAN communication unit 121, an extension interface 124, a digitalinterface 125, a first tuner/demodulator 130C, a secondtuner/demodulator 130T, a third tuner/demodulator 130L, a fourthtuner/demodulator 130B, a first decoder 140S, a second decoder 140U, anoperation input unit 180, a video selector 191, a monitor 192, a videooutput unit 193, an audio selector 194, a speaker 195, and an audiooutput unit 196.

The main controller 101 is a microprocessor unit that controls the wholebroadcast receiving apparatus 100 in accordance with a predeterminedoperating program. The system bus 102 is a communication path forexecuting transmission and reception of various kinds of data orcommands between the main controller 101 and each of operating blocks inthe broadcast receiving apparatus 100.

The ROM (Read Only Memory) 103 is a non-volatile memory in which a basicoperating program such as an operating system and other operatingprograms are stored, for example, and a rewritable ROM such as an EEPROM(Electrically Erasable Programmable ROM) or a flash ROM is used for theROM 103. Further, operating set values and the like necessary foroperations of the broadcast receiving apparatus 100 are stored in theROM 103. The RAM (Random Access Memory) 104 becomes a work area when thebasic operating program or the other operating program is executed. TheROM 103 and the RAM 104 may be configured integrally with the maincontroller 101. Further, the ROM 103 is not configured independently asillustrated in FIG. 2A, but a partial memory region in the storage(accumulator) 110 may be used instead.

An operating program and operating set values of the broadcast receivingapparatus 100, and personal information of a user of the broadcastreceiving apparatus 100 are stored in the storage (accumulator) 110.Further, an operating program downloaded via the Internet 800 andvarious kinds of data created by the operating program can be stored inthe storage (accumulator) 110. Further, content such as moving images,still images, or audios, which are obtained from a broadcast wave ordownloaded via the Internet 800 can be stored in the storage(accumulator) 110. All or a part of functions of the ROM 103 may besubstituted by a partial area of the storage (accumulator) 110. Further,the storage (accumulator) 110 is required to hold stored informationeven in a state where power source is not supplied to the broadcastreceiving apparatus 100 from the outside. Therefore, for example, adevice including a semiconductor element memory such as a flash ROM oran SSD (Solid State Drive) or a magnetic disk drive such as an HDD (HardDisc Drive) is used as the storage (accumulator) 110.

Note that each of the operating programs stored in the ROM 103 or thestorage (accumulator) 110 can be added, updated, and functionallyextended by a downloading process from each server apparatus on theInternet 800 or the broadcast wave.

The LAN communication unit 121 is connected to the Internet 800 via therouter device 800R, and executes transmission and reception of data witheach of the server apparatuses or the other communication equipment onthe Internet 800. Further, the LAN communication unit 121 executesacquisition of content data (or a part thereof) of a program, which aretransmitted via a communication line. The LAN communication unit 121 maybe connected to the router device 800R through wired communication orwireless communication such as Wi-Fi (registered trademark). The LANcommunication unit 121 includes a coding circuit and a decoding circuit.Further, the broadcast receiving apparatus 100 may further be providedwith the other communication unit such as a BlueTooth (registeredtrademark) communication unit, an NFC communication unit, or an infraredcommunication unit.

Each of the first tuner/demodulator 130C, the second tuner/demodulator130T, the third tuner/demodulator 130L, and the fourth tuner/demodulator130B receives the broadcast wave of the digital broadcasting service,and executes a channel selecting process (channel selection) by tuning achannel for a predetermined service on the basis of a control of themain controller 101. Moreover, each of the first tuner/demodulator 130C,the second tuner/demodulator 130T, the third tuner/demodulator 130L, andthe fourth tuner/demodulator 130B executes a demodulating process of amodulation wave from a received signal, a waveform shaping process, areconfiguring process of a frame structure and a layer structure, energydispersal removal, and error correction decoding process to reproduce apacket stream. Further, each of the first tuner/demodulator 130C, thesecond tuner/demodulator 130T, the third tuner/demodulator 130L, and thefourth tuner/demodulator 130B executes an extracting and decodingprocess for a transmission TMCC (Transmission Multiplexing ConfigurationControl) signal from the received signal.

Note that a digital broadcasting wave of an existing terrestrial digitalbroadcasting service received by an antenna 200C, which is an antennafor receiving existing terrestrial digital broadcasting, can be inputtedinto the first tuner/demodulator 130C. Further, one broadcasting signalof a polarized wave of a horizontal (H) polarization signal and avertical (V) polarization signal of dual-polarized terrestrial digitalbroadcasting (will be described later) can also be inputted into thefirst tuner/demodulator 130C to demodulate a segment of a layer adoptingthe same modulation method as that of the existing terrestrial digitalbroadcasting service. Further, a broadcasting signal of layered divisionmultiplexing terrestrial digital broadcasting (will be described later)can also be inputted into the first tuner/demodulator 130C to demodulatethe layer adopting the same modulation method as that of the existingterrestrial digital broadcasting service. A digital broadcasting wave ofan advanced terrestrial digital broadcasting service received by anantenna 200T, which is an antenna for receiving the dual-polarizedterrestrial digital broadcasting, is inputted into the secondtuner/demodulator 130T via a converter 201T. The digital broadcastingwave of the advanced terrestrial digital broadcasting service receivedby an antenna 200L, which is an antenna for receiving the layereddivision multiplexing terrestrial digital broadcasting, is inputted intothe third tuner/demodulator 130L via a converter 201L. A digitalbroadcasting wave of an advanced BS (Broadcasting Satellite) digitalbroadcasting service or an advanced CS (Communication Satellite) digitalbroadcasting service received by an antenna 200B, which is an antennafor receiving both BS/CS, is inputted into the fourth tuner/demodulator130B via a converter 201B.

Note that the expression “tuner/demodulator” means a component providedwith a tuner function and a demodulator function.

Further, the antenna 200C, the antenna 200T, the antenna 200L, theantenna 200B, the converter 201T, the converter 201L, the converter 201Bdo not constitute a part of the broadcast receiving apparatus 100, andbelong to a facility side such as a building in which the broadcastreceiving apparatus 100 is installed.

Further, the existing terrestrial digital broadcasting described aboveis a broadcasting signal of a terrestrial digital broadcasting servicefor transmitting video whose maximum resolution is 1920 horizontalpixels×1080 vertical pixels.

Further, details of the dual-polarized terrestrial digital broadcasting(advanced terrestrial digital broadcasting adopting a dual-polarizedtransmission method) will be described later. However, it is abroadcasting signal of the terrestrial digital broadcasting service inwhich video whose maximum resolution is the number of pixels thatexceeds 1920 horizontal pixels×1080 vertical pixels can be transmitted.The dual-polarized terrestrial digital broadcasting is terrestrialdigital broadcasting using a plurality of polarized waves including ahorizontal (H) polarized wave and a vertical (V) polarized wave. Theterrestrial digital broadcasting service in which the video whosemaximum resolution is the number of pixels that exceeds 1920 horizontalpixels×1080 vertical pixels can be transmitted is transmitted by a partof divided segments in both the polarized waves of the plurality ofpolarized waves.

Note that in the explanation of each embodiment of the presentinvention, in a case where the expression “a plurality of polarizedwaves” is used for the dual-polarized terrestrial digital broadcasting,it means the two polarized waves of the horizontal (H) polarized waveand the vertical (V) polarized wave unless otherwise stated. Further,even in case where the expression “polarized wave” is simply used, itmeans the “polarization signal”. Further, in one polarized wave or boththe polarized waves of the plurality of polarized waves, the existingterrestrial digital broadcasting described above in which the videowhose maximum resolution is 1920 horizontal pixels×1080 vertical pixelsis transmitted by transmitted a part of divided segments can betransmitted by the same modulation method. Namely, in dual-polarizedterrestrial digital broadcasting, by different segments of the pluralityof polarized waves according to each embodiment of the presentinvention, the existing terrestrial digital broadcasting service inwhich the video whose maximum resolution is 1920 horizontal pixels×1080vertical pixels is transmitted and the terrestrial digital broadcastingservice in which the video whose maximum resolution is the number ofpixels that exceeds 1920 horizontal pixels×1080 vertical pixels can betransmitted can be transmitted at the same time.

Further, although details of the layered division multiplexingterrestrial digital broadcasting (that is, the advanced terrestrialdigital broadcasting adopting a layered division multiplexingtransmission method) will be described later, it is a broadcastingsignal of the terrestrial digital broadcasting service in which thevideo whose maximum resolution is the number of pixels that exceeds 1920horizontal pixels×1080 vertical pixels can be transmitted. The layereddivision multiplexing terrestrial digital broadcasting multiplexes aplurality of digital broadcasting signals whose signal levels aredifferent from each other. The layered division multiplexing terrestrialdigital broadcasting according to each embodiment of the presentinvention can transmit, as the plurality of digital broadcasting signalswhose signal levels are different from each other, a broadcasting signalof the existing terrestrial digital broadcasting service in which videowhose maximum resolution is 1920 horizontal pixels×1080 vertical pixelsis transmitted and a broadcasting signal of the terrestrial digitalbroadcasting service in which the video whose maximum resolution is thenumber of pixels that exceeds 1920 horizontal pixels×1080 verticalpixels can be transmitted by multiplexing these broadcasting signals aslayers with a frequency band of the same physical channel. Namely, inthe layered division multiplexing terrestrial digital broadcastingaccording to each embodiment of the present invention, by a plurality oflayers whose signal levels are different from each other, it is possibleto transmit the existing terrestrial digital broadcasting service inwhich the video whose maximum resolution is 1920 horizontal pixels×1080vertical pixels is transmitted and the terrestrial digital broadcastingin which video whose maximum resolution is the number of pixels thatexceeds 1920 horizontal pixels×1080 vertical pixels can be transmittedat the same time.

Note that the broadcast receiving apparatus according to each embodimentof the present invention may be configured so as to be capable ofsuitably receiving advanced digital broadcasting, and it is notessential to include all of the first tuner/demodulator 130C, the secondtuner/demodulator 130T, the third tuner/demodulator 130L, and the fourthtuner/demodulator 130B. For example, the broadcast receiving apparatusmay include at least one of the second tuner/demodulator 130T or thethird tuner/demodulator 130L. Further, in order to realize a moreadvanced function, the broadcast receiving apparatus may be configuredso as to one or plural of the four tuner/demodulators described above inaddition to one of the second tuner/demodulator 130T or the thirdtuner/demodulator 130L.

Further, the antenna 200C, the antenna 200T, and the antenna 200L may beused together appropriately. Further, among the first tuner/demodulator130C, the second tuner/demodulator 130T, and the third tuner/demodulator130L, a plurality of tuners/demodulators may be used together (orintegrated) appropriately.

A packet stream outputted from the first tuner/demodulator 130C, thesecond tuner/demodulator 130T, the third tuner/demodulator 130L, and thefourth tuner/demodulator 130B or a packet stream obtained from eachserver apparatus on the Internet 800 via the LAN communication unit 121is inputted into each of the first decoder 140S and the second decoder140U. The packet stream inputted by each of the first decoder 140S andthe second decoder 140U may be a packet stream with any form such as anMPEG (Moving Picture Experts Group)-2 TS (Transport Stream), an MPEG-2PS (Program Stream), a TLV (Type Length Value), or an MMT (MPEG MediaTransport).

Each of the first decoder 140S and the second decoder 140U executes aconditional access (Conditional Access: CA) process, a demultiplexingprocess of demultiplexing and extracting various kinds of informationdata, such as video data or audio data, from the packet stream on thebasis of various kinds of control information contained in the packetstream, a decoding process for the video data and the audio data, aprocess of obtaining program information and generating an EPG(Electronic Program Guide: electronic program guide), a reproducingprocess of a data broadcasting screen or multimedia data, and the like.Further, each of the first decoder 140S and the second decoder 140U alsoexecutes a process of superimposing the generated EPG or the reproducedmultimedia data onto the decoded video data or the decoded audio data.

The video data outputted from the first decoder 140S and the video dataoutputted from the second decoder 140U are inputted into the videoselector 191, and the video selector 191 appropriately executes at leastone of a selecting process or a superimposing process on the basis of acontrol of the main controller 101. Further, the video selector 191appropriately executes a scaling process and a superimposing process ofOSD (On Screen Display) data. The monitor 192 is a display device suchas a liquid crystal panel for example. The monitor 192 displays videodata that are subjected to the selecting/superimposing process in thevideo selector 191 to provide the user of the broadcast receivingapparatus 100 therewith. The video output unit 193 is a video outputinterface for outputting the video data that are subjected to theselecting/superimposing process in the video selector 191 to theoutside.

The audio data outputted from the first decoder 140S and the audio dataoutputted from the second decoder 140U are inputted into the audioselector 194, and the audio selector 194 appropriately executes at leastone of a selecting process or a mixing process on the basis of a controlof the main controller 101. The speaker 195 outputs sound based on theaudio data that are subjected to the selecting/mixing process in theaudio selector 194 to provide the user of the broadcast receivingapparatus 100 therewith. The audio output unit 196 is an audio outputinterface for outputting the audio data that are subjected to theselecting/mixing process in the audio selector 194 to the outside.

The digital interface 125 is an interface for outputting or inputtingthe packet stream including at least one of coded digital video data orcoded digital audio data. The digital interface 125 can output thepacket stream that is inputted from any of the first tuner/demodulator130C, the second tuner/demodulator 130T, the third tuner/demodulator130L, and the fourth tuner/demodulator 130B by the first decoder 140S orthe second decoder 140U as it is. Further, the digital interface 125 mayinput the packet stream inputted from the outside via the digitalinterface 125 into the first decoder 140S or the second decoder 140U, ormay control the storage (accumulator) 110 to store the packet stream.Alternatively, the digital interface 125 may output the video data orthe audio data, which are demultiplexed and extracted in the firstdecoder 140S or the second decoder 140U. Further, the digital interface125 may input the video data or the audio data inputted from the outsidevia the digital interface 125 into the first decoder 140S or the seconddecoder 140U, or may control the storage (accumulator) 110 to store thevideo data or the audio data.

The extension interface 124 is a group of interfaces for extending thefunction of the broadcast receiving apparatus 100, and is configured byan analog video/audio interface, a USB (Universal Serial Bus) interface,a memory interface, or the like. The analog video/audio interfaceexecutes an input of an analog video signal/audio signal from externalvideo/audio output equipment, an output of an analog video signal/audiosignal to the external video/audio input equipment. The USB interfaceexecutes transmission and reception of data to and from a PC by beingconnected to the PC. The USB interface may execute recording ofbroadcasting program or the other content data by being connected to anHDD. Further, the USB interface may execute connection to a keyboard orthe other USB equipment. The memory interface executes transmission andreception of data by being connected to a memory card or the othermemory medium.

The operation input unit 180 is an instruction input unit configured toexecute an input of an operation instruction to the broadcast receivingapparatus 100, and is configured by a remote controller receiver forreceiving a command transmitted from a remote controller (remotecontroller) (whose illustration is omitted) and an operation keyconfigured by arranging button switches. The operation input unit 180may be configured by any one of the remote controller receiver and theoperation key. Further, the operation input unit 180 can be substitutedby a touch panel or the like disposed so as to be overlapped on themonitor 192. The operation input unit 180 may be substituted by akeyboard or the like connected to the extension interface 124. Theremote controller can be substituted by the portable informationterminal 700 provided with a remote controller command transmittingfunction.

Note that in a case where the broadcast receiving apparatus 100 is thetelevision receiver or the like, the video output unit 193 and the audiooutput unit 196 are not essential configuration. Further, the broadcastreceiving apparatus 100 may be an optical disc drive recorder such as aDVD (Digital Versatile Disc) recorder, a magnetic disk drive recordersuch as an HDD recorder, an STB (Set Top Box), or the like. Thebroadcast receiving apparatus 100 may be a PC (Personal Computer)provided with a receiving function of the digital broadcasting service,a tablet terminal, or the like. In a case where the broadcast receivingapparatus 100 is the DVD recorder, the HDD recorder, or the STB, themonitor 192 and the speaker 195 are not essential configuration. Byconnecting the video output unit 193 and the audio output unit 196 orthe digital interface 125 to an external monitor and an externalspeaker, the broadcast receiving apparatus 100 can execute the similaroperations to those of a television receiver or the like.

FIG. 2B is a block diagram illustrating one example of a detailedconfiguration of the first tuner/demodulator 130C.

An existing digital broadcasting wave received by the antenna 200C isinputted into the tuning/wave detector 131C, and the tuning/wavedetector 131C executes channel selection on the basis of a channelselection control signal. A TMCC decoder 132C extracts a TMCC signalfrom an output signal of the tuning/wave detector 131C, and obtainsvarious kinds of TMCC information. The obtained TMCC information is usedfor controlling respective latter processes. Details of the TMCC signaland the TMCC information will be described later.

A modulation wave modulated by using a method such as QPSK (QuadraturePhase Shift Keying), DQPSK (Differential QPSK), 16 QAM (QuadratureAmplitude Modulation), or 64 QAM is inputted into the demodulator 133Con the basis of the TMCC information and the like, and the demodulator133C executes a demodulating process including frequency deinterleaving,time deinterleaving, and a carrier demapping process. The demodulator133C may further be compatible with a modulation method different fromthe respective modulation methods described above.

A stream reproducer 134C executes a layer dividing process, an innercode error correcting process such as viterbi decoding, energy dispersalremoval, a stream reproducing process, and an outer code errorcorrecting process such as RS (Reed Solomon) decoding. Note that as theerror correcting process, a method different from each method describedabove may be used. Further, a packet stream reproduced by and outputtedfrom the stream reproducer 134C may be an MPEG-2 TS or the like, forexample. The packet stream may be the other form of packet stream.

FIG. 2C is a block diagram illustrating one example of a detailedconfiguration of the second tuner/demodulator 130T.

The horizontal (H) polarization signal of the digital broadcasting wavereceived by the antenna 200T is inputted into a tuning/wave detector131H, and the tuning/wave detector 131H executes channel selection onthe basis of the channel selection control signal. The vertical (V)polarization signal of the digital broadcasting wave received by theantenna 200T is inputted into a tuning/wave detector 131V, and thetuning/wave detector 131V executes channel selection on the basis of thechannel selection control signal. Note that an operation of the channelselecting process by the tuning/wave detector 131H and an operation ofthe channel selecting process by the tuning/wave detector 131V may becontrolled in conjunction with each other, or may be controlledindependently from each other. Namely, by assuming that the tuning/wavedetector 131H and the tuning/wave detector 131V are one tuning/wavedetector, it is possible to control the one tuning/wave detector toselect one channel of the digital broadcasting service transmitted byusing both horizontal/vertical polarized waves. By assuming that thetuning/wave detector 131H and the tuning/wave detector 131V are twoindependent tuning/wave detectors, it is possible to control the twoindependent tuning/wave detectors to respectively select two differentchannels of the digital broadcasting service transmitted by only thehorizontal polarized wave (or only the vertical polarized wave).

Note that the horizontal (H) polarization signal and the vertical (V)polarization signal received by the second tuner/demodulator 130T of thebroadcast receiving apparatus according to each embodiment of thepresent invention may be a polarization signal by a broadcast wave whosepolarization direction is different by approximately 90 degrees, and aconfiguration regarding their reception between the horizontal (H)polarization signal and the vertical (V) polarization signal, which willbe described below, may be reversed.

A TMCC decoder 132H extracts the TMCC signal from an output signal ofthe tuning/wave detector 131H to obtain various kinds of TMCCinformation. A TMCC decoder 132V extracts the TMCC signal from an outputsignal of the tuning/wave detector 131V to obtain various kinds of TMCCinformation. Any one of the TMCC decoder 132H and the TMCC decoder 132Vmay be provided. The obtained TMCC information is used for controllingrespective latter processes.

A modulation wave modulated by using a method such as BPSK (Binary PhaseShift Keying), DBPSK (Differential BPSK), QPSK, DQPSK, 8PSK (Phase ShiftKeying), 16APSK (Amplitude and Phase Shift Keying), 32 APSK, 16 QAM, 64QAM, 256 QAM, or 1024 QAM is inputted into each of a demodulator 133Hand a demodulator 133V on the basis of the TMCC information and thelike, and each of the demodulator 133H and the demodulator 133V executesa demodulating process including frequency deinterleaving, timedeinterleaving, and carrier demapping process. The demodulator 133H andthe demodulator 133V may further be compatible with a modulation methoddifferent from the respective modulation methods described above.

Each of a stream reproducer 134H and a stream reproducer 134V executes alayer dividing process, an inner code error correcting process such asviterbi decoding or LDPC (Low Density Parity Check) decoding, energydispersal removal, a stream reproducing process, and an outer code errorcorrecting process such as RS decoding or BCH decoding. Note that as theerror correcting process, one different from each of the methodsdescribed above may be used. Further, a packet stream reproduced by andoutputted from the stream reproducer 134H is an MPEG-2 TS or the like,for example. A packet stream reproduced by and outputted from the streamreproducer 134V is a TLV including the MPEG-2 TS and an MMT packetstream, for example. Each of the packet streams may be the other form ofpacket stream.

FIG. 2D is a block diagram illustrating one example of detailedconfiguration of the third tuner/demodulator 130L.

A digital broadcasting wave subjected to a layered division multiplexing(Layered Division Multiplexing: LDM) process is inputted into atuning/wave detector 131L from the antenna 200L, and the tuning/wavedetector 131L executes channel selection on the basis of the channelselection control signal. The digital broadcasting wave subjected to thelayered division multiplexing process may be used for transmission of adigital broadcasting service (or a different channel of the samebroadcasting service) in which a modulation wave of an upper layer(Upper Layer: UL) is different from a modulation wave of a lower layer(Lower Layer: LL). Further, the modulation wave of the upper layer andthe modulation wave of the lower layer are respectively outputted to ademodulator 133S and a demodulator 133L.

The modulation wave of the upper layer and the modulation wave of thelower layer outputted from the tuning/wave detector 131L is inputtedinto a TMCC decoder 132L, and the TMCC decoder 132L extracts the TMCCsignal to obtain various kinds of TMCC information. A signal inputtedinto the TMCC decoder 132L may be any one of the modulation wave of theupper layer and the modulation wave of the lower layer.

The demodulator 133S and the demodulator 133L respectively execute thesimilar operations to those of the demodulator 133H and the demodulator133V. For this reason, detailed explanation thereof is omitted. Further,a stream reproducer 134S and a stream reproducer 134L respectivelyexecute the similar operations to those of the stream reproducer 134Hand the stream reproducer 134V. For this reason, detailed explanationthereof is omitted.

FIG. 2E is a block diagram illustrating one example of a detailedconfiguration of the fourth tuner/demodulator 130B.

A digital broadcasting wave of an advanced BS digital broadcastingservice or an advanced CS digital broadcasting service received by theantenna 200B is inputted into a tuning/wave detector 131B, and thetuning/wave detector 131B executes channel selection on the basis of thechannel selection control signal. The other operations are similar tothose of the tuning/wave detector 131H and the tuning/wave detector131V. For this reason, detailed explanation thereof is omitted. Further,a TMCC decoder 132B, a demodulator 133B, and a stream reproducer 134Balso execute the similar operations of the TMCC decoder 132H or the TMCCdecoder 132V, the demodulator 133H or the demodulator 133V, and thestream reproducer 134V, respectively. For this reason, detailedexplanation thereof is omitted.

FIG. 2F is a block diagram illustrating one example of a detailedconfiguration of the first decoder 140S.

A selector 141S selects, on the basis of a control of the maincontroller 101, one from the packet stream inputted from the firsttuner/demodulator 130C, the packet stream inputted from the secondtuner/demodulator 130T, and the packet stream inputted from the thirdtuner/demodulator 130L, and outputs the selected one. The packet streaminputted from each of the first tuner/demodulator 130C, the secondtuner/demodulator 130T, and the third tuner/demodulator 130L is theMPEG-2 TS or the like, for example. A CA descrambler 142S executes areleasing process of encoding algorithm with a predetermined scramblemethod on the basis of various kinds of control information regardingconditional access superimposed onto the packet stream.

A demultiplexer 143S is a stream decoder, and demultiplexes and extractsvideo data, audio data, caption data, subtitle data, or programinformation data on the basis of various kinds of control informationcontained in the inputted packet stream. The demultiplexed and extractedvideo data are distributed to a video decoder 145S; the demultiplexedand extracted audio data are distributed to an audio decoder 146S; thedemultiplexed and extracted caption data, subtitle data, and programinformation data are distributed to a data decoder 144S. The packetstream obtained from the server apparatus on the Internet 800 via theLAN communication unit 121 (for example, the MPEG-2 PS or the like) maybe inputted into the demultiplexer 143S. Further, the demultiplexer 143Scan output the packet stream inputted from each of the firsttuner/demodulator 130C, the second tuner/demodulator 130T, and the thirdtuner/demodulator 130L via the digital interface 125 to the outside, andthe packet stream obtained from the outside via the digital interface125 can be inputted into the demultiplexer 143S.

The video decoder 145S executes a decoding process of video informationsubjected to compression coding, a colorimetry converting process to thedecoded video information, and a dynamic range converting process withrespect to the video data inputted from the demultiplexer 143S. Further,the video decoder 145S executes a process of resolution conversion(up/down conversion) based on a control of the main controller 101, andappropriately outputs video data with resolution such as UHD (3840horizontal pixels×2160 vertical pixels), HD (1920 horizontal pixels×1080vertical pixels), or SD (720 horizontal pixels×480 vertical pixels). Theoutput of the video data may be executed with the other resolution. Theaudio decoder 146S executes a decoding process of audio informationsubjected to compression coding. Further, the audio decoder 146Sexecutes a downmixing process based on a control of the main controller101, and outputs the audio data by channel number such as 22.2 ch, 7.1ch, 5.1 ch, or 2 ch. Note that the first decoder 140S may include aplurality of video decoders 145S and a plurality of audio decoders 146Sin order to execute a plurality of decoding processes for video data andaudio data at the same time.

The data decoder 144S executes a process of generating an EPG on thebasis of the program information data, a data broadcasting screengenerating process based on BML data, and a controlling process of acooperation application based on a broadcasting/communicationcooperating function. The data decoder 144S includes a BML browserfunction of executing a BML document, and the data broadcasting screengenerating process is executed by the BML browser function. Further, thedata decoder 144S executes a process of decoding the caption data andgenerating caption information, and a process of decoding the subtitledata and generating subtitle information.

Each of a superimposer 147S, a superimposer 148S, and a superimposer149S executes a superimposing process for the video data outputted fromthe video decoder 145S, the EPG outputted from the data decoder 144S,and the data broadcasting screen. A composer 151S executes a process ofsynthesizing the audio data outputted from the audio decoder 146S andthe audio data reproduced by the data decoder 144S. A selector 150Sexecutes resolution selection of the video data based on a control ofthe main controller 101. Note that the functions of the superimposer147S, the superimposer 148S, the superimposer 149S, and the selector150S may be integrated with that of the video selector 191. The functionof the composer 151S may be integrated with that of the audio selector194.

FIG. 2G is a block diagram illustrating one example of a detailedconfiguration of the second decoder 140U.

A selector 141U selects one from the packet stream inputted from thesecond tuner/demodulator 130T, the packet stream inputted from the thirdtuner/demodulator 130L, and the packet stream inputted from the fourthtuner/demodulator 130B on the basis of a control of the main controller101, and outputs the selected one. The packet stream inputted from eachof the second tuner/demodulator 130T, the third tuner/demodulator 130L,and the fourth tuner/demodulator 130B is an MMT packet stream or TLV orthe like including the MMT packet stream, for example. The packet streammay be a packet stream of an MPEG-2 TS form that adopts HEVC (HighEfficiency Video Coding) to a video compressing method. A CA descrambler142U executes a releasing process of encoding algorithm with apredetermined scramble method on the basis of various kinds of controlinformation regarding conditional access superimposed onto the packetstream.

A demultiplexer 143U is a stream decoder, and demultiplexes and extractsvideo data, audio data, caption data, subtitle data, or programinformation data on the basis of various kinds of control informationcontained in the inputted packet stream. The demultiplexed and extractedvideo data are distributed to a video decoder 145U; the demultiplexedand extracted audio data are distributed to an audio decoder 146U; thedemultiplexed and extracted caption data, subtitle data, and programinformation data are distributed to a multimedia decoder 144U. Thepacket stream obtained from the server apparatus on the Internet 800 viathe LAN communication unit 121 (for example, the MPEG-2 PS, the MMTpacket stream, or the like) may be inputted into the demultiplexer 143U.Further, the demultiplexer 143U can output the packet stream inputtedfrom each of the second tuner/demodulator 130T, the thirdtuner/demodulator 130L, and the fourth tuner/demodulator 130B via thedigital interface 125 to the outside, and the packet stream obtainedfrom the outside via the digital interface 125 can be inputted into thedemultiplexer 143U.

The multimedia decoder 144U executes a process of generating an EPG, amultimedia screen generating process based on multimedia data, and acontrolling process of a cooperation application based on abroadcasting/communication cooperating function on the basis of theprogram information data. The multimedia decoder 144U includes an HTMLbrowser function of executing an HTML document, and the multimediascreen generating process is executed by the HTML browser function.

The video decoder 145U, the audio decoder 146U, a superimposer 147U, asuperimposer 148U, a superimposer 149U, a composer 151U, and a selector150U are respectively components that have the similar functions to thevideo decoder 145S, the audio decoder 146S, the superimposer 147S, thesuperimposer 148S, the superimposer 149S, the composer 151S, and theselector 150S. By changing the end of each of the reference signs “S”into “U” in the explanation about the video decoder 145S, the audiodecoder 146S, the superimposer 147S, the superimposer 148S, thesuperimposer 149S, the composer 151S, and the selector 150S illustratedin FIG. 2F, the video decoder 145U, the audio decoder 146U, thesuperimposer 147U, the superimposer 148U, the superimposer 149U, thecomposer 151U, and the selector 150U illustrated in FIG. 2G mayrespectively be explained. For this reason, further detailed explanationthereof is omitted.

[Software Configuration of Broadcast Receiving Apparatus]

FIG. 2H is a software configuration diagram of the broadcast receivingapparatus 100, and illustrates one example of a software configurationof the storage (accumulator) 110 (or the ROM 103, the same applieshereinafter) and the RAM 104. A basic operating program 1001, areceiving function program 1002, a browser program 1003, a contentmanaging program 1004, and the other operating program 1009 are storedin the storage (accumulator) 110. Further, the storage (accumulator) 110includes: a content memory region 1011 configured to store content datasuch as moving images, still images, or audio; an authenticationinformation memory region 1012 configured to store authenticationinformation used when communicating or cooperating with externalportable terminal equipment or the server apparatus; and a various kindsof information memory region 1019 configured to store various kinds ofother information.

The basic operating program 1001 stored in the storage (accumulator) 110is developed on the RAM 104, and the main controller 101 furtherexecutes the developed basic operating program, thereby constituting abasic operating controller 1101. Further, the receiving function program1002, the browser program 1003, and the content managing program 1004,which are stored in the storage (accumulator) 110, are respectivelydeveloped on the RAM 104, and the main controller 101 further executesthe developed operating programs, thereby constituting a receivingfunction controller 1102, a browser engine 1103, and a content manager1104. Further, the RAM 104 includes a temporary memory region 1200configured to temporarily hold data created at the time of execution ofeach of the operating programs as needed.

Note that hereinafter, in order to simplify explanation thereof, a casewhere the main controller 101 develops the basic operating program 1001stored in the storage (accumulator) 110 on the RAM 104 and executes thedeveloped basic operating program 1001, whereby the basic operatingcontroller 1101 executes a process of controlling each operating blockwill be described. The similar description is made with respect to theother operating programs.

The receiving function controller 1102 executes basic controls such as abroadcast receiving function or a broadcasting/communication cooperatingfunction of the broadcast receiving apparatus 100. In particular, atuning/demodulator 1102 a mainly controls the channel selecting process,a TMCC information obtaining process, and the demodulating process ineach of the first tuner/demodulator 130C, the second tuner/demodulator130T, the third tuner/demodulator 130L, and the fourth tuner/demodulator130B. A stream reproduction controller 1102 b mainly controls the layerdividing process, the error correction decoding process, the energydispersal removal, and the stream reproducing process in each of thefirst tuner/demodulator 130C, the second tuner/demodulator 130T, thethird tuner/demodulator 130L, and the fourth tuner/demodulator 130B. AnAV decoder 1102 c mainly controls the demultiplexing process (or astream decoding process), a video data decoding process, and an audiodata decoding process in each of the first decoder 140S and a seconddecoder 140H. A multimedia (MM) data reproducer 1102 d mainly controls aBML data reproducing process, a caption data decoding process, asubtitle data decoding process, and a controlling process of acommunication cooperation application in the first decoder 140S, and anHTML data reproducing process, the multimedia screen generating process,and a controlling process of a communication cooperation application inthe second decoder 140H. An EPG generator 1102 e mainly controls an EPGgenerating process and a displaying process of the generated EPG in eachof the first decoder 140S and the second decoder 140H. A presentationprocessor 1102 f executes controls of the colorimetry convertingprocess, the dynamic range converting process, a resolution convertingprocess, and the downmixing process for audio in each of the firstdecoder 140S and the second decoder 140H, and controls of the videoselector 191 and the audio selector 194.

At the time of the BML data reproducing process or the HTML datareproducing process described above, a BML browser 1103 a and an HTMLbrowser 1103 b of the browser engine 1103 respectively executeinterpretation of a BML document or an HTML document, and execute thedata broadcasting screen generating process or the multimedia screengenerating process.

The content manager 1104 executes time schedule management and executioncontrol at the time of execution of video recording reservation or timerrecording of a broadcasting program, and expiration date management ofthe cooperation application obtained based on copyright management andthe broadcasting/communication cooperating function when thebroadcasting program or a recorded program is outputted from the digitalinterface 125 or the LAN communication unit 121.

Each of the operating programs may be stored in advance in at least oneof the storage (accumulator) 110 or the ROM 103 at the time of productshipment. Each of the operating programs may be obtained from the serverapparatus on the Internet 800 via the LAN communication unit 121 or thelike after the product shipment. Further, each of the operating programsstored in a memory card or an optical disc may be obtained via theextension interface 124. Each of the operating programs may be newlyobtained or updated via the broadcast wave.

[Configuration of Broadcast Station Server]

FIG. 3A is one example of an internal configuration of the broadcaststation server 400. The broadcast station server 400 is configured by amain controller 401, a system bus 402, a RAM 404, a storage 410, a LANcommunication unit 421, and a digital broadcasting signal sender 460.

The main controller 401 is a microprocessor unit configured to controlthe whole broadcast station server 400 in accordance with apredetermined operating program. The system bus 402 is a communicationpath for executing transmission and reception of various kinds of dataor commands between the main controller 401 and each operating block inthe broadcast station server 400. The RAM 404 becomes a work area at thetime of execution of each of operating programs.

A basic operating program 4001, a content management/distributionprogram 4002, and a content sending program 4003 are stored in thestorage 410, and the storage 410 further includes a content data memoryregion 4011 and a metadata memory region 4012. Contents data of eachbroadcasting program broadcasted by the broadcast station are stored inthe content data memory region 4011. Metadata such as program titles ofthe respective broadcasting programs, program IDs, program summaries,casts, broadcasting dates, or the like are stored in the metadata memoryregion 4012.

Further, each of the basic operating program 4001, the contentmanagement/distribution program 4002, and the content sending program4003 stored in the storage 410 is developed on the RAM 404, and the maincontroller 401 further executes the developed basic operating program,the developed content management/distribution program, the developedcontent sending program, thereby constituting a basic operatingcontroller 4101, a content management/distribution controller 4102, anda content sending controller 4103.

Note that hereinafter, in order to simplify explanation thereof, a casewhere the main controller 401 develops the basic operating program 4001stored in the storage 410 on the RAM 404 and executed the developedbasic operating program 4001, whereby the basic operating controller4101 executes a process of controlling each operating block will bedescribed. The similar description is made with respect to the otheroperating programs.

The content management/distribution controller 4102 executes managementof the content data and the metadata respectively stored in the contentdata memory region 4011 and the metadata memory region 4012, and acontrol of the content data and the metadata at the time of provision ofthem to the service provider on the basis of contract. Moreover, thecontent management/distribution controller 4102 executes anauthentication process of the service provider server 500 as needed atthe time of provision of the content data or the metadata to the serviceprovider.

The content sending controller 4103 executes time schedule managementwhen the content data of the broadcasting program stored in the contentdata memory region 4011 and a stream containing a program title or aprogram ID of the broadcasting program stored in the metadata memoryregion 4012 and copy control information of program content are sent outvia the digital broadcasting signal sender 460.

The LAN communication unit 421 is connected to the Internet 800, andexecutes communication with the service provider server 500 or anothercommunication equipment on the Internet 800. The LAN communication unit421 includes a coding circuit, a decoding circuit, and the like. Thedigital broadcasting signal sender 460 subjects a stream constituted bycontent data and program information data for each of the broadcastingprograms stored in the content data memory region 4011 to a process suchas modulation, and sends out the processed stream as a digitalbroadcasting wave via the radio tower 300.

[Configuration of Service Provider Server]

FIG. 3B is one example of an internal configuration of the serviceprovider server 500. The service provider server 500 is configured by amain controller 501, a system bus 502, a RAM 504, a storage 510, and aLAN communication unit 521.

The main controller 501 is a microprocessor unit configured to controlthe whole service provider server 500 in accordance with a predeterminedoperating program. The system bus 502 is a communication path forexecuting transmission and reception of various kinds of data orcommands between the main controller 501 and each operating block in theservice provider server 500. The RAM 504 becomes a work area at the timeof execution of each of operating programs.

A basic operating program 5001, a content management/distributionprogram 5002, and an application management/distribution program 5003are stored in the storage 510, and the storage 510 further includes acontent data memory region 5011, a metadata memory region 5012, and anapplication memory region 5013. The content data and the metadataprovided from the broadcast station server 400, or content created bythe service provider and metadata regarding the content are stored inthe content data memory region 5011 and the metadata memory region 5012.Applications to be distributed in response to a request from eachtelevision receiver (at least one of operating programs or various kindsof data), which are required to realize each service of thebroadcasting/communication cooperation system, are stored in theapplication memory region 5013.

Further, the basic operating program 5001, the contentmanagement/distribution program 5002, and the applicationmanagement/distribution program 5003, which are stored in the storage510, are respectively developed on the RAM 504, and the main controller501 further executes the developed basic operating program, thedeveloped content management/distribution program, and the developedapplication management/distribution program, thereby constituting abasic operating controller 5101, a content management/distributioncontroller 5102, and an application management/distribution controller5103.

Note that hereinafter, in order to simplify explanation thereof, a casewhere the main controller 501 develops the basic operating program 5001stored in the storage 510 on the RAM 504 and executes the developedbasic operating program 5001, whereby the basic operating controller5101 executes a process of controlling each operating block will bedescribed. The similar description is made with respect to the otheroperating programs.

The content management/distribution controller 5102 executes acquisitionof content data and metadata from the broadcast station server 400,management of the content data and the metadata respectively stored inthe content data memory region 5011 and the metadata memory region 5012,and a control of distribution of the content data and the metadata toeach television receiver. Further, the applicationmanagement/distribution controller 5103 executes management of eachapplication stored in the application memory region 5013, and controlwhen each application is distributed in response to a request from eachtelevision receiver. Moreover, the application management/distributioncontroller 5103 also executes an authentication process of thecorresponding television receiver as needed when each application isdistributed to each television receiver.

The LAN communication unit 521 is connected to the Internet 800, andexecutes communication with the broadcast station server 400 or theother communication equipment on the Internet 800. Further, the LANcommunication unit 521 executes communication with the broadcastreceiving apparatus 100 or the portable information terminal 700 via therouter device 800R. The LAN communication unit 521 includes a codingcircuit, a decoding circuit, and the like.

[Broadcast Wave of Digital Broadcasting]

Here, one example of the broadcast wave of digital broadcasting receivedby the broadcast receiving apparatus according to the embodiment of thepresent invention will be described.

The broadcast receiving apparatus 100 can receive the terrestrialdigital broadcasting service that shares at least a part ofspecifications with ISDB-T (Integrated Services Digital Broadcasting forTerrestrial Television Broadcasting) method. Specifically, thedual-polarized terrestrial digital broadcasting that the secondtuner/demodulator 130T can receive is advanced terrestrial digitalbroadcasting that shares the part of the specifications with the ISDB-Tmethod. Further, the layered division multiplexing terrestrial digitalbroadcasting that the third tuner/demodulator 130L can receive is theadvanced terrestrial digital broadcasting shares the part of thespecifications with the ISDB-T method. Note that the existingterrestrial digital broadcasting that the first tuner/demodulator 130Ccan receive is terrestrial digital broadcasting with the ISDB-T method.Further, advanced BS digital broadcasting or advanced CS digitalbroadcasting that the fourth tuner/demodulator 130B can receive isdigital broadcasting with a method different from the ISDB-T method.

Here, the dual-polarized terrestrial digital broadcasting and thelayered division multiplexing terrestrial digital broadcasting accordingto the present embodiment adopts OFDM (Orthogonal Frequency DivisionMultiplexing: orthogonal frequency division multiplexing) that is one ofmulti-carrier methods as a transmission method in the similar manner tothe ISDB-T method. Since the OFDM is a multi-carrier method, a symbollength thereof is long, and it is effective to add a redundant portionin a time axis direction called a guard interval. This makes it possibleto reduce an influence on multipath within a range of the guardinterval. For this reason, it is possible to realize an SFN (SingleFrequency Network: single frequency network), and this makes it possibleto use the frequency effectively.

In the dual-polarized terrestrial digital broadcasting and the layereddivision multiplexing terrestrial digital broadcasting according to thepresent embodiment, a carrier of the OFDM is divided into groups calledsegments in the similar manner to the ISDB-T method. As illustrated inFIG. 4A, one channel bandwidth of the digital broadcasting service isconfigured by 13 segments. The central part of the band is set to aposition of segment 0, and segment numbers (0 to 12) are assigned aboveand below this position in turn. Transmission path coding of thedual-polarized terrestrial digital broadcasting and the layered divisionmultiplexing terrestrial digital broadcasting according to the presentembodiment is executed in units of OFDM segments. For this reason, it ispossible to define layer transmission. For example, in the bandwidth ofone television channel, it is possible to allocate a part of the OFDMsegments to a fixed receiving service, and allocate the remaining to amobile receiving service. In the layer transmission, each layer isconfigured by one OFDM segment or a plurality of OFDM segments, and itis possible to set, for each layer, parameters such as a carriermodulation method, a coding rate of an inner code, or a length of timeinterleaving. Note that the number of layers may be set arbitrarily, forexample, and the number of layers may be set up to three layers. FIG. 4Billustrates one example of a layer allocation of the OFDM segments in acase where the number of layers is three or two. In the example of (1)of FIG. 4B, the number of layers is three; an A layer is configured byone segment (segment 0); a B layer is configured by seven segments(segments 1 to 7); and a C layer is configured by five segments(segments 8 to 12). In the example of (2) of FIG. 4B, the number oflayers is three; an A layer is configured by one segment (segment 0); aB layer is configured by five segments (segments 1 to 5); and a C layeris configured by seven segments (segments 6 to 12). In the example of(3) of FIG. 4B, the number of layers is two; an A layer is configured byone segment (segment 0); and a B layer is configured by 12 segments(segments 1 to 12). The number of OFDM segments and transmission pathcoding parameters of each layer are determined in accordance withorganization information, and are transmitted by the TMCC signal that iscontrol information for assisting the operation of the receiver.

Note that as one example of a usage example of segment layer allocationillustrated in (1), (2), and (3) of FIG. 4B, the following may be anexample, for example.

For example, the layer allocation illustrated in (1) of FIG. 4B can beused in the dual-polarized terrestrial digital broadcasting according tothe present embodiment, and the same segment layer allocation may beused for both a horizontal polarized wave and a vertical polarized wave.Specifically, the mobile receiving service of the existing terrestrialdigital broadcasting may be transmitted by the one segment describedabove of the horizontal polarized wave as the A layer. (Note that in themobile receiving service of the existing terrestrial digitalbroadcasting, the same service may be transmitted by the one segmentdescribed above of the vertical polarized wave. In this case, this isalso treated as the A layer.) Further, the terrestrial digitalbroadcasting service in which video whose maximum resolution is 1920horizontal pixels×1080 vertical pixels, which is the existingterrestrial digital broadcasting, is transmitted may be transmitted bythe seven segments described above of the horizontal polarized wave asthe B layer. (Note that the terrestrial digital broadcasting service inwhich the video whose maximum resolution is 1920 horizontal pixels×1080vertical pixels is transmitted may transmit the same service by theseven segments described above of the vertical polarized wave. In thiscase, this is also treated as the B layer.) Moreover, it may beconfigured so as to transmit the advanced terrestrial digitalbroadcasting service capable of transmitting the video whose maximumresolution is the number of pixels that exceeds 1920 horizontalpixels×1080 vertical pixels by the five segments described above of eachof both the horizontal polarized wave and the vertical polarized wave,that is, by total ten segments as the C layer. Details of thetransmission will be described later. A transmission wave of the segmentlayer allocation can be received by the second tuner/demodulator 130T ofthe broadcast receiving apparatus 100, for example.

For example, the layer allocation illustrated in (2) of FIG. 4B can beused as an example different from that illustrated in (1) of FIG. 4B inthe dual-polarized terrestrial digital broadcasting according to thepresent embodiment, and the same segment layer allocation may be usedfor both the horizontal polarized wave and the vertical polarized wave.Specifically, the mobile receiving service of the existing terrestrialdigital broadcasting may be transmitted by the one segment describedabove of the horizontal polarized wave as the A layer. (Note that themobile receiving service of the existing terrestrial digitalbroadcasting may transmit the same service by the one segment describedabove of the vertical polarized wave. In this case, this is also treatedas the A layer.) Moreover, it may be configured so as to transmit theadvanced terrestrial digital broadcasting service capable oftransmitting the video whose maximum resolution is the number of pixelsthat exceeds 1920 horizontal pixels×1080 vertical pixels by the fivesegments described above of each of both the horizontal polarized waveand the vertical polarized wave, that is, by total ten segments as the Blayer. Further, the terrestrial digital broadcasting service, which isthe existing terrestrial digital broadcasting, in which the video whosemaximum resolution is 1920 horizontal pixels×1080 vertical pixels istransmitted, may be transmitted by the seven segments described above ofthe horizontal polarized wave as the C layer. (Note that the terrestrialdigital broadcasting service in which the video whose maximum resolutionis 1920 horizontal pixels×1080 vertical pixels is transmitted maytransmit the same service by the seven segments described above of thevertical polarized wave. In this case, this is also treated as the Clayer.) Details of the transmission will be described later. Atransmission wave of the segment layer allocation can be received by thesecond tuner/demodulator 130T of the broadcast receiving apparatus 100according to the present embodiment, for example.

For example, the layer allocation illustrated in (3) of FIG. 4B can beused in the layered division multiplexing terrestrial digitalbroadcasting or the existing terrestrial digital broadcasting accordingto the present embodiment. Specifically, in a case where the layereddivision multiplexing terrestrial digital broadcasting is used, themobile receiving service of the existing terrestrial digitalbroadcasting may be transmitted by one segment illustrated in FIG. 4B asthe A layer. Moreover, it may be configured so as to transmit theadvanced terrestrial digital broadcasting service capable oftransmitting the video whose maximum resolution is the number of pixelsthat exceeds 1920 horizontal pixels×1080 vertical pixels by 12 segmentsillustrated in FIG. 4B as the B layer. A transmission wave of thesegment layer allocation can be received by the third tuner/demodulator130L of the broadcast receiving apparatus 100 according to the presentembodiment, for example. in a case where the existing terrestrialdigital broadcasting is used, the mobile receiving service of theexisting terrestrial digital broadcasting may be transmitted by onesegment illustrated in FIG. 4B as the A layer, and the terrestrialdigital broadcasting service, which is the existing terrestrial digitalbroadcasting, in which the video whose maximum resolution is 1920horizontal pixels×1080 vertical pixels is transmitted, may betransmitted by 12 segments illustrated in FIG. 4B as the B layer. Atransmission wave of the segment layer allocation can be received by thefirst tuner/demodulator 130C of the broadcast receiving apparatus 100according to the present embodiment, for example.

FIG. 4C illustrates one example of a system at the broadcast stationside, which realizes a generating process for an OFDM transmission wavethat is a digital broadcasting wave of the dual-polarized terrestrialdigital broadcasting and the layered division multiplexing terrestrialdigital broadcasting according to the present embodiment. An informationsource coder 411 codes each of video/audio/various kinds of data. Amultiplexer/conditional access processor 415 multiplexes thevideo/audio/various kinds of data respectively coded in the informationsource coder 411; further executes a process corresponding toconditional access appropriately; and outputs them as a packet stream. Aplurality of information source coders 411 and a plurality ofmultiplexer/conditional access processors 415 can be providedparallelly, thereby generating a plurality of packet streams. Atransmission path coder 416 remultiplexes the plurality of packetstreams to create one packet stream, and executes a transmission pathcoding process to output it as the OFDM transmission wave. In theconfiguration illustrated in FIG. 4C, details of a method of informationsource coding and transmission path coding are different, but aconfiguration of realizing the generating process for the OFDMtransmission wave is common to the ISDB-T method. Therefore, a part ofthe plurality of information source coders 411 and the plurality ofmultiplexer/conditional access processors 415 may be configured for theterrestrial digital broadcasting service with the ISDB-T method, anotherpart thereof may be configured for the advanced terrestrial digitalbroadcasting service, and packet streams of a plurality of differentterrestrial digital broadcasting services may be multiplexed in thetransmission path coder 416. In a case where the multiplexer/conditionalaccess processor 415 is configured for the terrestrial digitalbroadcasting service with the ISDB-T method, the MPEG-2 TS that is astream of a TSP (Transport Stream Packet) defined by MPEG-2 systems maybe generated. Further, in a case where the multiplexer/conditionalaccess processor 415 is configured for the advanced terrestrial digitalbroadcasting service, the MMT packet stream or a TLV stream includingthe MMT packet or the stream of the TSP defined by another system may begenerated. Of course, all of the plurality of information source coders411 and the plurality of multiplexer/conditional access processors 415may be configured for the advanced terrestrial digital broadcastingservice, and all of the packet streams to be multiplexed by thetransmission path coder 416 may be a packet stream for the advancedterrestrial digital broadcasting service.

FIG. 4D illustrates one example of a configuration of the transmissionpath coder 416.

(1) of FIG. 4D will first be described. (1) of FIG. 4D is aconfiguration of the transmission path coder 416 in a case where onlythe OFDM transmission wave of the digital broadcasting for the existingterrestrial digital broadcasting service is generated. The OFDMtransmission wave transmitted by this configuration has a segmentconfiguration illustrated in (3) of FIG. 4B, for example. Redundancy oferror correction is added to the packet stream inputted from themultiplexer/conditional access processor 415 and subjected to aremultiplexing process, and various kinds of interleaving processes suchas byte interleaving, bit interleaving, time interleaving, or frequencyinterleaving are also executed for the packet stream. Then, a process byIFFT (Inverse Fast Fourier Transform) is executed together with a pilotsignal, the TMCC signal, and the AC signal, and it becomes the OFDMtransmission wave through orthogonal modulation after a guard intervalis added. Note that the processes of an outer coding process, a powerspreading process, the byte interleaving, an inner coding process, and amapping process are configured so that the processes can be executedseparately for each layer such as the A layer or the B layer. (Note thatthe digital broadcasting of the existing terrestrial digitalbroadcasting service has two layers in its operation, but it is possibleto transmit up to three layers. For this reason, (1) of FIG. 4Dillustrates an example of three layers.) The mapping process is amodulating process for a carrier. Further, in the packet stream inputtedfrom the multiplexer/conditional access processor 415, information suchas the TMCC information, a mode, or a guard interval ratio may bemultiplexed. Note that as described above, the packet stream inputtedinto the transmission path coder 416 may be a stream of the TSP definedby the MPEG-2 systems. The OFDM transmission wave generated by theconfiguration illustrated in (1) of FIG. 4D can be received by the firsttuner/demodulator 130C of the broadcast receiving apparatus 100according to the present embodiment, for example.

Next, (2) of FIG. 4D will be described. (2) of FIG. 4D is aconfiguration of the transmission path coder 416 in a case where theOFDM transmission wave of the dual-polarized terrestrial digitalbroadcasting according to the present embodiment is generated. The OFDMtransmission wave transmitted by this configuration has a segmentconfiguration illustrated in (1) or (2) of FIG. 4B, for example. In (2)of FIG. 4D, various kinds of interleaving processes such as the byteinterleaving, the bit interleaving, the time interleaving, or thefrequency interleaving are also executed for the packet stream inputtedfrom the multiplexer/conditional access processor 415 and subjected tothe remultiplexing process in addition to addition of redundancy oferror correction. Then, a process by the IFFT is executed together withthe pilot signal, the TMCC signal, and the AC signal, and it becomes theOFDM transmission wave through the orthogonal modulation after a guardinterval adding process is executed.

In the configuration example illustrated in (2) of FIG. 4D, processes ofthe outer coding process, the power spreading process, the byteinterleaving, the inner coding process, the mapping process, and thetime interleaving are configured so that the processes can be executedseparately for each layer such as the A layer, the B layer, or the Clayer. However, in the configuration example illustrated in (2) of FIG.4D, not only the OFDM transmission wave of a horizontal polarized wave(H) but also the OFDM transmission wave of a vertical polarized wave (V)are generated, and a processing flow thus branches to two lines. Whenbranching from a processing system of the horizontal polarized wave (H)to a processing system of the vertical polarized wave (V), it ispossible to differentiate, for each layer in accordance with the segmentconfiguration explained with reference to (1) or (2) of FIG. 4B, whetherthe same data as that of the processing system of the horizontalpolarized wave (H) is caused to branch to the processing system of thevertical polarized wave (V), different data from that of the processingsystem of the horizontal polarized wave (H) is caused to branch to theprocessing system of the vertical polarized wave (V), or any data iscaused not to branch to the processing system of the vertical polarizedwave (V).

As the processes indicated in the configuration of (2) of FIG. 4D, suchas the outer code, the inner code, or the mapping, it is possible to usea more advanced process that is not adopted in each process of theconfiguration of (1) of FIG. 4D in addition to the processes compatiblewith the configuration of (1) of FIG. 4D. Specifically, in theconfiguration of (2) of FIG. 4D, for a portion where the process isexecuted for each layer, the processes compatible with (1) of FIG. 4Dare executed in the layer in which the mobile receiving service of theexisting terrestrial digital broadcasting or the existing terrestrialdigital broadcasting service for transmitting and the video whosemaximum resolution is 1920 horizontal pixels×1080 vertical pixels istransmitted with respect to the processes such as the outer code, theinner code, or the mapping. On the other hand, in the configuration of(2) of FIG. 4D, for a portion where the process is executed for eachlayer, it may be configured so that more advanced process that is notadopted in each process of the configuration of (1) of FIG. 4D for thelayer in which the advanced terrestrial digital broadcasting servicecapable of transmitting the video whose maximum resolution is the numberof pixels that exceeds 1920 horizontal pixels×1080 vertical pixels istransmitted with respect to the processes such as the outer code, theinner code, or the mapping.

Note that in the dual-polarized terrestrial digital broadcastingaccording to the present embodiment according to the present embodiment,the TMCC information (will be described later) allows allocation oflayer and the content terrestrial digital broadcasting service to betransmitted to be switched. For this reason, it is desirable that it isconfigured so that the process such as the outer code, the inner code,or the mapping to be subjected to each layer can be switched by the TMCCinformation.

Note that with respect to the layer for transmitting the advancedterrestrial digital broadcasting service in which the video whosemaximum resolution is the number of pixels that exceeds 1920 horizontalpixels×1080 vertical pixels can be transmitted, as the byteinterleaving, the bit interleaving, and the time interleaving, a processcompatible with the existing terrestrial digital broadcasting servicemay be executed, or more advanced different process may be executed.Alternatively, with respect to the layer for transmitting the advancedterrestrial digital broadcasting service, part of the interleavings maybe omitted.

Further, in the configuration illustrated in (2) of FIG. 4D, an inputstream that becomes a source of the layer in which the mobile receivingservice of the existing terrestrial digital broadcasting or the existingterrestrial digital broadcasting service for transmitting the videowhose maximum resolution is 1920 horizontal pixels×1080 vertical pixelsis transmitted may be a stream of the TSP defined by the MPEG-2 systemsthat is adopted by the existing terrestrial digital broadcasting amongthe packet streams inputted into the transmission path coder 416. Aninput stream that becomes a source of the layer for transmitting theadvanced terrestrial digital broadcasting service with the configurationillustrated in (2) of FIG. 4D may be a stream defined by a systemdifferent from the stream of the TSP defined by the MPEG-2 systems suchas the MMT packet stream or the TLV including MMT packet among thepacket streams inputted into the transmission path coder 416. However, astream of the TSP defined by the MPEG-2 systems in the advancedterrestrial digital broadcasting service may be adopted.

In the configuration of (2) of FIG. 4D explained above, in the layer inwhich the mobile receiving service of the existing terrestrial digitalbroadcasting or the existing terrestrial digital broadcasting servicefor transmitting the video whose maximum resolution is 1920 horizontalpixels×1080 vertical pixels is transmitted, a stream form compatiblewith the existing terrestrial digital broadcasting and a process aremaintained until the OFDM transmission wave is generated from the inputstream. As a result, even in a case where the receiving apparatus forthe existing terrestrial digital broadcasting service receives onetransmission wave of the OFDM transmission wave of the horizontalpolarized wave generated in the configuration illustrated in (2) of FIG.4D and the OFDM transmission wave of the vertical polarized wave, itbecomes possible to receive and demodulate the broadcasting signal ofthe terrestrial digital broadcasting service correctly with respect tothe layer in which the mobile receiving service of the existingterrestrial digital broadcasting or the existing terrestrial digitalbroadcasting service for transmitting the video whose maximum resolutionis 1920 horizontal pixels×1080 vertical pixels is transmitted.

Further, in the configuration illustrated in (2) of FIG. 4D, it ispossible to transmit the advanced terrestrial digital broadcastingservice capable of transmitting the video whose maximum resolution isthe number of pixels that exceeds 1920 horizontal pixels×1080 verticalpixels in the layer in which segments of both the OFDM transmission waveof the horizontal polarized wave and the OFDM transmission wave of thevertical polarized wave are used, it becomes possible to receive anddemodulate the broadcasting signal of the advanced terrestrial digitalbroadcasting service by the broadcast receiving apparatus 100 accordingto the embodiment of the present invention.

Namely, in the configuration illustrated in (2) of FIG. 4D, it is alsopossible to generate a digital broadcasting wave the digitalbroadcasting can suitably receive and demodulate both in the broadcastreceiving apparatus that is compatible with the advanced terrestrialdigital broadcasting service and in the receiving apparatus for theexisting terrestrial digital broadcasting service.

Next, (3) of FIG. 4D will be described. (3) of FIG. 4D is aconfiguration of the transmission path coder 416 in a case where theOFDM transmission wave of the layered division multiplexing terrestrialdigital broadcasting according to the present embodiment is generated.In (3) of FIG. 4D, various kinds of interleaving processes such as thebyte interleaving, the bit interleaving, the time interleaving, or thefrequency interleaving are also executed for the packet stream inputtedfrom the multiplexer/conditional access processor 415 and subjected tothe remultiplexing process in addition to addition of redundancy oferror correction. Then, a process by the IFFT is executed together withthe pilot signal, the TMCC signal, and the AC signal, and it becomes theOFDM transmission wave through the orthogonal modulation after the guardinterval is added.

However, in the configuration of (3) of FIG. 4D, each of a modulationwave transmitted by the upper layer and a modulation wave transmitted bythe lower layer is generated, and the OFDM transmission wave that is adigital broadcasting wave after multiplexing is generated. A processingsystem indicated at an upper side of the configuration illustrated in(3) of FIG. 4D is a processing system for generating the modulation waveto be transmitted by the upper layer, and a processing system indicatedat a lower side is a processing system for generating the modulationwave to be transmitted by the lower layer. Data for transmitting theprocessing system for the generating the modulation wave to betransmitted by the upper layer illustrated in (3) of FIG. 4D are themobile receiving service of the existing terrestrial digitalbroadcasting and the existing terrestrial digital broadcasting servicefor transmitting the video whose maximum resolution is 1920 horizontalpixels×1080 vertical pixels, and various kinds of processes in theprocessing system for generating the modulation wave to be transmittedby the upper layer illustrated in (3) of FIG. 4D are processes that arethe same as various kinds of processed of (1) of FIG. 4D or hascompatibility therewith. The modulation wave to be transmitted by theupper layer illustrated in (3) of FIG. 4D has a segment configurationillustrated in (3) of FIG. 4B as well as the transmission waveillustrated in (1) of FIG. 4D, for example. Therefore, the modulationwave to be transmitted by the upper layer illustrated in (3) of FIG. 4Dis a digital broadcasting wave that has compatibility with the existingterrestrial digital broadcasting service for transmitting the mobilereceiving service of the existing terrestrial digital broadcasting orthe video whose maximum resolution is 1920 horizontal pixels×1080vertical pixels. On the other hand, data for transmitting the processingsystem for generating the modulation wave to be transmitted by the lowerlayer illustrated in (3) of FIG. 4D are the advanced terrestrial digitalbroadcasting service capable of transmitting the video whose maximumresolution is the number of pixels that exceeds 1920 horizontalpixels×1080 vertical pixels, for example, and it may be configured sothat a more advanced process that is not adopted in each process of theconfiguration illustrated in (1) of FIG. 4D is used with respect to theprocesses such as the outer code, the inner code, or the mapping.

The modulation wave to be transmitted by the lower layer illustrated in(3) of FIG. 4D may be allocated to the advanced terrestrial digitalbroadcasting service capable of transmitting the video whose maximumresolution is the number of pixels that exceeds 1920 horizontalpixels×1080 vertical pixels by using all of the 13 segments as the Alayer, for example. Alternatively, the mobile receiving service of theexisting terrestrial digital broadcasting having a segment configurationillustrated in (3) of FIG. 4B may be transmitted by the A layer of onesegment, and the advanced terrestrial digital broadcasting servicecapable of transmitting the video whose maximum resolution is the numberof pixels that exceeds 1920 horizontal pixels×1080 vertical pixels maybe transmitted by the B layer of 12 segments. In case of the latter, aswell as (2) of FIG. 4D, it may be configured so that the processes areswitched for each layer such as the A layer or the B layer from theouter coding process to time interleaving process. In the layer fortransmitting the mobile receiving service of the existing terrestrialdigital broadcasting, it is similar to explanation for (2) of FIG. 4D inthat it is necessary to maintain the process compatible with theexisting terrestrial digital broadcasting.

In the configuration illustrated in (3) of FIG. 4D, the OFDMtransmission wave, which is a terrestrial digital broadcasting waveobtained by multiplexing the modulation wave to be transmitted by theupper layer and the modulation wave to be transmitted by the lowerlayer, is generated. A technique of separating the modulation wave to betransmitted by the upper layer from the 4-D OFDM transmission wave isalso equipped with the receiving apparatus for the existing terrestrialdigital broadcasting service. For this reason, the broadcasting signal,which is contained in the modulation wave to be transmitted by the upperlayer, of the mobile receiving service of the existing terrestrialdigital broadcasting or the existing terrestrial digital broadcastingservice for transmitting the video whose maximum resolution is 1920horizontal pixels×1080 vertical pixels is correctly received anddemodulated by the receiving apparatus of the existing terrestrialdigital broadcasting service. On the other hand, the broadcastingsignal, which is contained in the modulation wave to be transmitted bythe lower layer, of the advanced terrestrial digital broadcastingservice capable of transmitting the video whose maximum resolution isthe number of pixels that exceeds 1920 horizontal pixels×1080 verticalpixels can be received and demodulated by the broadcast receivingapparatus 100 according to the embodiment of the present invention.

Namely, in the configuration illustrated in (3) of FIG. 4D, it ispossible to generate the digital broadcasting wave by which the digitalbroadcasting can be received and demodulated suitably in both thebroadcast receiving apparatus that is compatible with the advancedterrestrial digital broadcasting service and the receiving apparatus ofthe existing terrestrial digital broadcasting service. Further, in theconfiguration illustrated in (3) of FIG. 4D, unlike the configurationillustrated in (2) of FIG. 4D, it is possible to generate the OFDMtransmission wave that can be received more easily without necessity touse the plurality of polarized waves.

In the 4-D OFDM transmission wave generating process illustrated in (1)of FIG. 4D, (2) of FIG. 4D, and (3) of FIG. 4D according to the presentembodiment, three types of modes with the different number of carriersare prepared in consideration of the suitability of a distance betweenstations of the SFN and the resistance to Doppler shift in mobilereception. Note that another mode with the different number of carriersmay further be prepared. In a mode with a large number of carriers, aneffective symbol length becomes longer, and a guard interval lengthbecomes longer if the guard interval ratio (guard intervallength/effective symbol length) is the same. This makes it possible tohave resistance to multipath with a long delay time difference. On theother hand, in case of a mode with the small number of carriers, acarrier interval becomes wide, and it is possible to reduce an influenceof inter-carrier interference due to the Doppler shift that occurs incase of mobile reception or the like.

In the 4-D OFDM transmission wave generating process illustrated in (1)of FIG. 4D, (2) of FIG. 4D, and (3) of FIG. 4D according to the presentembodiment, it is possible to set, for each layer configured by one OFDMsegment or a plurality of OFDM segments, parameters such as a carriermodulation method, a code rate of an inner code, or a length of timeinterleaving. FIG. 4E illustrates one example of a transmissionparameter for one segment unit of the OFDM segment identified in themode of the system according to the present embodiment. Note that acarrier modulation method in FIG. 4E indicates a modulation method of a“data” carrier. An SP signal, a CP signal, a TMCC signal, and an ACsignal adopt a modulation method different from the modulation method ofthe “data” carrier. These signals are signals whose resistance to noiseis more important than the quantity of information. For this reason, amodulation method of executing mapping to a constellation with a smallnumber of states (BPSK or DBPSK, that is, two states) than themodulation method of “data” carrier (all are QPSK or more, that is, fourstates or more) is adopted, and this heightens the resistance to noise.

Further, each numerical value of the number of carriers is a value in acase where numerical values at a left side of an oblique line set QPSK,16 QAM, or 64 QAM as the carrier modulation method, and is a value in acase where numerical values at a right side of the oblique line setDQPSK as the carrier modulation method. In FIG. 4E, underlinedparameters are parameters each of which is not compatible with themobile receiving service of the existing terrestrial digitalbroadcasting. Specifically, 256 QAM, 1024 QAM, and 4096 QAM in themodulation method of the “data” carrier are not adopted in the existingterrestrial digital broadcasting service. Therefore, in a process in thelayer that requires compatibility with the existing terrestrial digitalbroadcasting service in an OFDM broadcast wave generating processaccording to (1) of FIG. 4D, (2) of FIG. 4D, and (3) of FIG. 4D of thepresent embodiment, 256 QAM, 1024 QAM, and 4096 QAM of the modulationmethod of the “data” carrier are not used. Further multi-levelmodulation method such as 256 QAM (the number of states is 256), 1024QAM (the number of states is 1024), or 4096 QAM (the number of states is4096) may be applied to the “data” carrier transmitted by the layercorresponding to the advanced terrestrial digital broadcasting servicein addition to the modulation method that has compatibility with theexisting terrestrial digital broadcasting service, such as QPSK (thenumber of states is 4), 16 QAM (the number of states is 16), or 64 QAM(the number of states is 64). Further, a modulation method differentfrom these modulation methods may be adopted.

Note that as the modulation method for a pilot symbol (SP or CP)carrier, BPSK (the number of states is two) compatible with the existingterrestrial digital broadcasting service may be used. As the modulationmethod for an AC carrier and a TMCC carrier, DBPSK (the number of statesis 2) compatible with the existing terrestrial digital broadcastingservice may be used.

Further, as a method of the inner coding process, an LDPC code is notadopted in the existing terrestrial digital broadcasting service.Therefore, in the process for the layer necessary for compatibility withthe existing terrestrial digital broadcasting service in the OFDMbroadcast wave generating process illustrated in (1) of FIG. 4D, (2) ofFIG. 4D, and (3) of FIG. 4D according to the present embodiment, theLDPC code is not used. The LDPC code may be applied, as the inner code,to the data to be transmitted by the layer that is compatible with theadvanced terrestrial digital broadcasting service. Further, as a methodof the outer coding process, a BCH code is not adopted in the existingterrestrial digital broadcasting service. Therefore, in the process forthe layer necessary for compatibility with the existing terrestrialdigital broadcasting service in the OFDM broadcast wave generatingprocess illustrated in (1) of FIG. 4D, (2) of FIG. 4D, and (3) of FIG.4D according to the present embodiment, the BCH code is not used. TheBCH code may be applied, as the outer code, to the data to betransmitted by the layer that is compatible with the advancedterrestrial digital broadcasting service.

Further, FIG. 4F illustrates one example of a transmission signalparameter for one physical channel (6 MHz bandwidth) unit of the OFDMbroadcast wave generating process illustrated in (1) of FIG. 4D, (2) ofFIG. 4D, and (3) of FIG. 4D according to the present embodiment. In theOFDM broadcast wave generating process illustrated in (1) of FIG. 4D,(2) of FIG. 4D, and (3) of FIG. 4D according to the present embodiment,for compatibility with the existing terrestrial digital broadcastingservice, parameters compatible with the existing terrestrial digitalbroadcasting service are basically adopted in the parameters illustratedin FIG. 4F as a general rule. However, in a case where all of thesegments in the modulation wave to be transmitted by the lower layerillustrated in (3) of FIG. 4D are allocated to the advanced terrestrialdigital broadcasting service, it is not necessary to maintaincompatibility with the existing terrestrial digital broadcasting servicein the modulation wave. Therefore, in this case, parameters other thanthe parameters illustrated in FIG. 4F may be used with respect to themodulation wave to be transmitted by the lower layer illustrated in (3)of FIG. 4D.

Next, carriers of the OFDM transmission wave according to the presentembodiment will be described. In addition to carriers by which data suchas video or audio are transmitted, a carrier by which the pilot signal(SP, CP, AC1, or AC2) that becomes a reference of demodulation istransmitted, and a carrier by which the TMCC signal that is informationon a modulation form and a convolution code rate of the carrier istransmitted are included in the carriers of the OFDM transmission waveaccording to the present embodiment. A number of carriers correspondingto 1/9 of the number of carriers for each segment is used for thesetypes of transmission. Further, a concatenate code is adopted for theerror correction; a shortened reed Solomon (204, 188) code is adoptedfor the outer code; a constraint length of 7 is adopted for the innercode; and a punctured convolution code with a code rate of ½ as a mothercode is adopted. Coding different from the above may be used for boththe outer code and the inner code. Information rate differs dependingupon parameters such as a carrier modulation form, a convolution coderate, or a guard interval ratio.

Further, 204 symbols are set as one frame, and the integer number ofTSPs are included in one frame. Switching of transmission parameters isexecuted at the boundary of this frame.

There are an SP (Scattered Pilot), a CP (Continual Pilot), an AC(Auxiliary Channel) 1, and an AC2 as the pilot signals that becomes areference of demodulation. FIG. 4G illustrates one example of anarrangement image of the pilot signals in the segments in case ofsynchronous modulation (such as QPSK, 16 QAM, 64 QAM, 256 QAM, 1024 QAM,or 4096 QAM). The SP is inserted into the segment of the synchronousmodulation; is transmitted to 12 carriers in a carrier number (frequencyaxis) direction once; and is transmitted to four symbols in an OFDMsymbol number (time axis) direction once. Since an amplitude and a phaseof the SP are known, the SP can be used as a reference of synchronousdemodulation. FIG. 4H illustrates one example of an arrangement image ofthe pilot signals in the segment in case of differential modulation(such as DQPSK). The CP is a continuous signal that is inserted at aleft end of the segment for differential modulation, and is used fordemodulation.

The AC1 and the AC2 carry information on the CP, and is also used fortransmission of information for broadcaster in addition to a role of thepilot signal. They may be used for transmission of other information.

Note that each of the arrangement images illustrated in FIG. 4G and FIG.4H is an example of in case of mode 3, and carrier numbers are 0 to 431.However, in case of each of mode 1 and mode 2, carrier numbers are 0 to107 or 0 to 215. Further, the carrier for transmitting the AC1, the AC2,or the TMCC may be determined in advance for each segment. Note that thecarrier for transmitting the AC1, the AC2, and the TMCC are arranged atrandom in a frequency direction in order to reduce an influence ofperiodic dip of transmission path characteristics by multipath.

The TMCC signal transmits information (TMCC information) regarding alayer configuration, a transmission parameter of the OFDM segment, and ademodulation operation of the receiver. The TMCC signal is transmittedby a carrier for TMCC transmission defined in each segment. FIG. 5Aillustrates one example of bit allocation of the TMCC carrier. The TMCCcarrier is configured by 204 bits (B0 to B203). The B0 is a demodulationreference signal for a TMCC symbol, and has a predetermined amplitudeand a predetermined phase reference. Each of the B1 to B16 is asynchronization signal, and is configured by words with 16 bits. As thesynchronization signal, two types of w0 and w1 are defined, and the w0and w1 are alternately sent out for each frame. The B17 to B19 are usedfor identification of a segment form, by which it is identified whethereach segment is a differential modulator or a synchronous modulator. TheTMCC information is described in the B20 to B121. The B122 to B203 areparity bits.

The TMCC information of the OFDM transmission wave according to thepresent embodiment may be configured so as to contain, as one examplethereof, information for assisting demodulation and a decoding operationof the receiver, such as system identification, a transmission parameterswitching indicator, a startup control signal (a startup flag foremergency warning broadcasting), current information, next information,frequency converting process identification, physical channel numberidentification, main signal identification, 4K signal transmission layeridentification, or additional layer transmission identification, forexample. The current information indicates a current layer configurationand a transmission parameter, and the next information indicates a layerconfiguration and a transmission parameter after switching. Theswitching of the transmission parameter is executed on a frame unitbasis. FIG. 5B illustrates one example of bit allocation of the TMCCinformation. Further, FIG. 5C illustrates one example of a configurationof transmission parameter information contained in the currentinformation/next information. Note that a connected transmission phasecorrection amount is control information used in case of terrestrialdigital audio broadcasting ISDB-TSB (ISDB for Terrestrial SoundBroadcasting) having a common transmission method, and detailedexplanation herein is omitted.

FIG. 5D illustrates one example of bit allocation of the systemidentification. Two bits are allocated to a signal for the systemidentification. In case of an existing terrestrial digital televisionbroadcasting system, “00” is set. In a case where the transmissionmethod is a common terrestrial digital audio broadcasting system, “01”is set. Further, in case of an advanced terrestrial digital televisionbroadcasting system such as the dual-polarized terrestrial digitalbroadcasting or the layered division multiplexing terrestrial digitalbroadcasting according to the present embodiment, “10” is set. In theadvanced terrestrial digital television broadcasting system, it ispossible to transmit a 2K broadcasting program (that is, a broadcastingprogram of video with 1920 horizontal pixels×1080 vertical pixels, abroadcasting program of video with lower resolution than it) and a 4Kbroadcasting program (that is, a broadcasting program of video withresolution that exceeds 1920 horizontal pixels×1080 vertical pixels) inthe same service at the same time by means of broadcast wavetransmission by the dual-polarized transmission method or the layereddivision multiplexing method.

The transmission parameter switching indicator is used to notify thereceiver of switching timing by counting down when the transmissionparameters are switched. This indicator is a value of “1111” at a normaltime. In a case where the transmission parameters are switched, thisindicator is subtracted by one for each frame from 15 frames beforeswitching. The switching timing is next frame synchronization in which“0000” is sent out. A value of the indicator returns to “1111” after“0000”. Countdown is executed in a case where any one or more ofparameters such as the system identification of the TMCC informationillustrated in FIG. 5B, the transmission parameter contained in thecurrent information/next information, the frequency converting processidentification, the main signal identification, the 4K signaltransmission layer identification, or the additional layer transmissionidentification is switched. Countdown is not executed in a case whereonly the startup control signal of the TMCC information is switched.

The startup control signal (that is, the startup flag for the emergencywarning broadcasting) is set to “1” when a startup control to thereceiver is executed in the emergency warning broadcasting. The startupcontrol signal is set to “0” when the startup control is not executed.

A partial reception flag for each of the current information/nextinformation is set to “1” in a case where a segment in the center of thetransmission band is set to partial reception. Otherwise, the partialreception flag thereof is set to “0”. In a case where segment 0 is setfor partial reception, the layer is defined as the A layer. In a casewhere the next information does not exist, the partial reception flagset to “1”.

FIG. 5E illustrates one example of bit allocation for a carriermodulation mapping method (a modulation method for the data carrier) ineach layer transmission parameter for each of the currentinformation/next information. In a case where this parameter is “000”,it indicates that the modulation method is DQPSK. In a case where thisparameter is “001”, it indicates that the modulation method is QPSK. Ina case where this parameter is “010”, it indicates that the modulationmethod is 16 QAM. In a case where this parameter is “011”, it indicatesthat the modulation method is 64 QAM. In a case where this parameter is“100”, it indicates that the modulation method is 256 QAM. In a casewhere this parameter is “101”, it indicates that the modulation methodis 1024 QAM. In a case where this parameter is “110”, it indicates thatthe modulation method is 4096 QAM. In a case where any unused layer orthe next information does not exist, this parameter is set to “111”.

For setting of the code rate or the length of the time interleaving,each parameter may be set in accordance with the organizationinformation of each layer for each of the current information/nextinformation. The number of segments indicates the number of segments ofeach layer by a numerical value of four bits. In a case where any unusedlayer or the next information does not exist, the number of segments isset to “1111”. Note that since settings of a mode or a guard intervalratio are independently detected at the receiver side, transmission bythe TMCC information may not be executed.

FIG. 5F illustrates one example of bit allocation of the frequencyconverting process identification. The frequency converting processidentification is set to “0” in a case where a frequency convertingprocess (in case of the dual-polarized transmission method) (will bedescribed later) or a frequency conversion amplification process (incase of the layered division multiplexing transmission method) isexecuted in the converter 201T or the converter 201L illustrated in FIG.2A. In a case where the frequency converting process or the frequencyconversion amplification process is not executed, the frequencyconverting process identification is set to “1”. This parameter may beconfigured so as to be set to “1” when it is sent out from the broadcaststation, for example. This parameter may be configured so as to berewritten into “0” in the converter 201T the converter 201L when thefrequency converting process or the frequency conversion amplificationprocess is executed in the converter 201T or the converter 201L. Byconfiguring it in this manner, in a case where it is received by thesecond tuner/demodulator 130T or the third tuner/demodulator 130L of thebroadcast receiving apparatus 100 and a bit of the frequency convertingprocess identification is “0”, it is possible to identify that thefrequency converting process was executed after the OFDM transmissionwave was sent out from the broadcast station.

In the dual-polarized terrestrial digital broadcasting according to thepresent embodiment, the setting or rewriting of the frequency convertingprocess identification bit may be executed in each of the plurality ofpolarized waves. For example, in a case where both of the plurality ofpolarized waves is not subjected to frequency conversion in theconverter 201T of FIG. 2A, the frequency converting processidentification bit contained in the OFDM transmission wave of each ofthe both may be left as “1”. Further, in a case where only one polarizedwave of the plurality of polarized waves is subjected to frequencyconversion in the converter 201T, the frequency converting processidentification bit included in the OFDM transmission wave of thepolarized wave subjected to the frequency conversion may be rewritteninto “0” in the converter 201T. Further, in a case where both of theplurality of polarized waves is subjected to frequency conversion in theconverter 201T, the frequency converting process identification bitincluded in the OFDM transmission wave of each of both of polarizedwaves subjected to the frequency conversion may be rewritten into “0” inthe converter 201T. By configuring it in this manner, it is possible toidentify presence or absence of the frequency conversion for eachpolarized wave of the plurality of polarized waves in the broadcastreceiving apparatus 100.

Note that since the frequency converting process identification bit isnot defined in the existing terrestrial digital broadcasting, it isignored in a terrestrial digital broadcasting receiving apparatus thathas already been used by the user. However, the bit may be introducedinto a new terrestrial digital broadcasting service obtained byimproving the existing terrestrial digital broadcasting, in which thevideo whose maximum resolution is 1920 horizontal pixels×1080 verticalpixels is transmitted. In this case, the first tuner/demodulator 130C ofthe broadcast receiving apparatus 100 according to the embodiment of thepresent invention may also be configured as a first tuner/demodulatorthat is compatible with the new terrestrial digital broadcastingservice.

Note that as a modification example, on the assumption that thefrequency converting process or the frequency conversion amplificationprocess is executed for the OFDM transmission wave in the converter 201Tor the converter 201L illustrated in FIG. 2A, this parameter may be setto “0” in advance when it is sent out from the broadcast station. Notethat in a case where the broadcast wave to be received is not theadvanced terrestrial digital broadcasting service, this parameter may beconfigured so as to be set to “1”.

FIG. 5G illustrates one example of bit allocation of the physicalchannel number identification. The physical channel numberidentification is configured by a code with six bits, and identifies aphysical channel number (13 ch to 52 ch) of the broadcast wave to bereceived. In a case where the broadcast wave to be received is not theadvanced terrestrial digital broadcasting service, this parameter is setto “111111”. A bit of the physical channel number identification is notdefined in the existing terrestrial digital broadcasting. Thus, thereceiving apparatus of the existing terrestrial digital broadcastingcould not obtain a physical channel number of a broadcast wave specifiedat the broadcast station side from the TMCC signal or the AC signal. Inthe broadcast receiving apparatus 100 according to the embodiment of thepresent invention, even though the carrier other than the TMCC signal orthe AC signal is not demodulated using the bit of the physical channelnumber identification of the received OFDM transmission wave, it ispossible to grasp the physical channel number that the broadcast stationsets for the OFDM transmission wave. Note that the physical channels 13ch to 52 ch have a bandwidth of 6 MHz per one ch, and are allocated to afrequency band from 470 to 710 MHz in advance. Therefore, the fact thatthe broadcast receiving apparatus 100 can grasp the physical channelnumber of the OFDM transmission wave on the basis of the bit of thephysical channel number identification means that the frequency band inwhich the OFDM transmission wave is transmitted in the air as theterrestrial digital broadcasting wave can be grasped.

In the dual-polarized terrestrial digital broadcasting according to thepresent embodiment, in the OFDM transmission wave generating process atthe broadcast station side, bits of the physical channel numberidentification may be arranged in each of the pair of polarized waves ofthe plurality of polarized waves in the bandwidth that originallyconstitutes one physical channel, and the same physical number may begiven thereto. Here, depending upon installation environment of thebroadcast receiving apparatus 100, only frequency of one polarized waveof the plurality of polarized waves may be converted in the converter201T illustrated in FIG. 2A. As a result, in a case where thefrequencies of the pair of polarized waves of the plurality of polarizedwaves are different from each other when they are received by thebroadcast receiving apparatus 100, the broadcast receiving apparatusside cannot demodulate the advanced terrestrial digital broadcasting byusing both of the polarized waves of the dual-polarized terrestrialdigital broadcasting if it is impossible to grasp, by any method, thatthe plurality of polarized waves with different frequencies wereoriginally the pair of polarized waves. Even in such a case, by usingthe bits of the physical channel number identification described above,in a case where the transmission wave in which the bits of the physicalchannel number identification indicate that the same value exists in aplurality of different frequencies in the broadcast receiving apparatus100, it is possible to identify that it is a transmission wavetransmitted as a pair of polarized waves that originally constitutes onephysical channel at the broadcast station side. This makes it possibleto realize demodulation of the advanced terrestrial digital broadcastingof the dual-polarized terrestrial digital broadcasting by using aplurality of transmission waves each indicating the same value.

FIG. 5H illustrates one example of bit allocation of the main signalidentification. The present embodiment is an example in which a bit ofthe main signal identification is arranged in bit B117.

In a case where the OFDM transmission wave to be transmitted is atransmission wave of the dual-polarized terrestrial digitalbroadcasting, this parameter is set to “1” in the TMCC information of atransmission wave to be transmitted by a main polarized wave. Thisparameter is set to “0” in the TMCC information of a transmission waveto be transmitted by a sub polarized wave. Note that the transmissionwave to be transmitted by the main polarized wave indicates apolarization signal in the same polarization direction as thepolarization direction used for transmission of the existing terrestrialdigital broadcasting service of a vertical polarized signal and ahorizontal polarized signal. Namely, in regions where transmission bythe horizontal polarized wave is adopted in the existing terrestrialdigital broadcasting service, in the dual-polarized terrestrial digitalbroadcasting service, the horizontal polarized wave is a main polarizedwave, and the vertical polarized wave is a sub polarized wave. Further,in areas where transmission by the vertical polarized wave is adopted inthe existing terrestrial digital broadcasting service, in thedual-polarized terrestrial digital broadcasting service, the verticalpolarized wave is a main polarized wave, and the horizontal polarizedwave is a sub polarized wave.

In the broadcast receiving apparatus 100 according to the embodiment ofthe present invention that receives the transmission wave of thedual-polarized terrestrial digital broadcasting, by using the bit of themain signal identification, it is possible to identify whether thereceived transmission wave is transmitted by the main polarized wave oris transmitted by the sub polarized wave at the time of transmissionthereof. For example, by using an identifying process for the mainpolarized wave and the sub polarized wave, it becomes possible toexecute a process in which at the time of an initial scan (will bedescribed later), an initial scan is first executed for the transmissionwave transmitted by the main polarized wave, and an initial scan is thenexecuted for the transmission wave transmitted by the sub polarized waveafter the initial scan for the transmission wave transmitted by the mainpolarized wave is completed.

Details of a configuration example of the digital broadcasting servicefor transmitting layers and segments of the dual-polarized terrestrialdigital broadcasting according to the present embodiment will bedescribed later. However, in a case where the existing terrestrialdigital broadcasting service is transmitted by using a layerconstituting a segment contained only in the main polarized wave and anadvanced terrestrial digital service is transmitted by a layercontaining a segment contained in both the main polarized wave and thesub polarized wave, the initial scan may first be executed for thetransmission wave transmitted by the main polarized wave; the initialscan for the existing terrestrial digital broadcasting service may becompleted; and then, the initial scan may be executed for thetransmission wave transmitted by the sub polarized wave to execute theinitial scan for the advanced terrestrial digital broadcasting service.By configuring it in this manner, it is possible to execute the initialscan for the advanced terrestrial digital broadcasting service after theinitial scan for the existing terrestrial digital broadcasting serviceis completed. This makes it possible to reflect settings of the initialscan for the existing terrestrial digital broadcasting service tosettings by the initial scan for the advanced terrestrial digitalbroadcasting service, whereby it is preferable.

Note that the definition of meanings of “1” and “0” of the bit of themain signal identification may be the reverse of the explanationdescribed above.

Further, in place of the bit of the main signal identification, apolarization direction identification bit may be used as one parameterof the TMCC information. Specifically, the polarization directionidentification bit may be set to “1” at the broadcast station side forthe transmission wave to be transmitted by the horizontal polarizedwave, and the polarization direction identification bit is set to “0” atthe broadcast station side for the transmission wave to be transmittedby the vertical polarized wave. In the broadcast receiving apparatus 100according to the embodiment of the present invention that receives thetransmission wave of the dual-polarized terrestrial digitalbroadcasting, by using the polarization direction identification bit, itis possible to identify whether the received transmission wave istransmitted in any polarization direction at the time of thetransmission thereof. For example, by using an identifying process forthe polarization direction, it becomes possible to execute a process inwhich at the time of an initial scan (will be described later), aninitial scan is first executed for the transmission wave transmitted bythe horizontal polarized wave, and an initial scan is then executed forthe transmission wave transmitted by the vertical polarized wave afterthe initial scan for the transmission wave transmitted by the horizontalpolarized wave is completed. With respect to explanation of effects ofthe process, the “main polarized wave” in the part regarding the initialscan in the explanation described above for the bit of the main signalidentification may be read as the “horizontal polarized wave”, and the“sub polarized wave” may be read as the “vertical polarized wave”. Forthis reason, repeated explanation thereof is omitted.

Note that the definition of meanings of “1” and “0” of the polarizationdirection identification bit may be the reverse of the explanationdescribed above.

Further, in place of the bit of the main signal identification describedabove, a first signal/second signal identification bit may be used asone parameter of the TMCC information. Specifically, one polarized waveof the horizontal polarized wave and the vertical polarized wave may bedefined as a first polarized wave; a broadcasting signal of thetransmission wave to be transmitted by the first polarized wave may bedefined as a first signal; and the first signal/second signalidentification bit may be set to “1” at the broadcast station side.Further, the other polarized wave may be defined as a second polarizedwave; a broadcasting signal of the transmission wave to be transmittedby the second polarized wave may be defined as a second signal; and thefirst signal/second signal identification bit may be set to “0” at thebroadcast station side. In the broadcast receiving apparatus 100according to the embodiment of the present invention that receives thetransmission wave of the dual-polarized terrestrial digitalbroadcasting, by using the first signal/second signal identificationbit, it is possible to identify whether the received transmission waveis transmitted in any polarization direction at the time of thetransmission thereof. Note that in the first signal/second signalidentification bit, concepts of the “main polarized wave” and the “subpolarized wave” from the definition of the bit of the main signalidentification described above are merely replaced by the “firstpolarized wave” and the “second polarized wave”. With respect to theprocess and the effects of the broadcast receiving apparatus 100, the“main polarized wave” in the part regarding the process of the broadcastreceiving apparatus 100 in the explanation described above for the bitof the main signal identification may be read as the “first polarizedwave”, and the “sub polarized wave” may be read as the “second polarizedwave”. For this reason, repeated explanation thereof is omitted.

Note that the definition of meanings of “1” and “0” of the firstsignal/second signal identification bit may be the reverse of theexplanation described above.

Next, in the transmission wave of the layered division multiplexingterrestrial digital broadcasting according to the present embodiment, inplace of the bit of the main signal identification described above, anupper/lower layer identification bit may be used as one parameter of theTMCC information. Specifically, the upper/lower layer identification bitdescribed above may be set to “1” in the TMCC information of themodulation wave to be transmitted by the upper layer, and theupper/lower layer identification bit described above may be set to “0”in the TMCC information of the transmission wave to be transmitted bythe lower layer. Further, in a case where the received broadcast wave isnot the advanced terrestrial digital broadcasting service, thisparameter may be set to “1”.

In the layered division multiplexing terrestrial digital broadcastingaccording to the present embodiment, here, in the generating process forthe OFDM transmission wave at the broadcast station, with respect to alower layer of a plurality of modulation waves originally transmitted byan upper layer and the lower layer of one physical channel, frequencyconversion and signal amplification may be executed by the converter201L illustrated in FIG. 2A depending upon installation environment ofthe broadcast receiving apparatus 100. In a case where the broadcastreceiving apparatus 100 receives the transmission wave of the layereddivision multiplexing terrestrial digital broadcasting, it is possibleto identify, on the basis of the upper/lower layer identification bitdescribed above, whether it is the modulation wave originallytransmitted by the upper layer, or the modulation wave transmitted bythe lower layer. For example, by means of the identifying process, it ispossible to execute the initial scan for the advanced terrestrialdigital broadcasting service to be transmitted by the lower layer afterthe initial scan for the existing terrestrial digital broadcastingservice to be transmitted by the upper layer is completed, and thismakes it possible to reflect the settings of the initial scan for theexisting terrestrial digital broadcasting service to the settings by theinitial scan for the advanced terrestrial digital broadcasting service.Further, in the third tuner/demodulator 130L of the broadcast receivingapparatus 100, it is possible to use the identification result forswitching between the demodulator 133S and the demodulator 133L.

Note that in description of the dual-polarized transmission methodaccording to each embodiment described below, unless otherwisespecified, an example in which the horizontal polarized wave is the mainpolarized wave and the vertical polarized wave is the sub polarized wavewill be described as one example. However, with respect to thehorizontal polarized wave and the vertical polarized wave, the relationbetween the main and the sub may be reversed.

FIG. 5I illustrates one example of bit allocation of the 4K signaltransmission layer identification.

In a case where the broadcast wave to be transmitted is the transmissionwave of the dual-polarized terrestrial digital broadcasting serviceaccording to the present embodiment, a bit of the 4K signal transmissionlayer identification may indicate for each of the B layer and the Clayer whether transmission of the 4K broadcasting program is executed byusing both the horizontal polarized signal and the vertical polarizedsignal or not. One bit is allocated to each of setting of the B layerand setting of the C layer. For example, in a case where the bit of the4K signal transmission layer identification for each of the B layer andthe C layer is “0”, it may indicate that the transmission of the 4Kbroadcasting program is executed by using both the horizontal polarizedsignal and the vertical polarized signal in the layer. In a case wherethe bit of the 4K signal transmission layer identification for each ofthe B layer and the C layer is “1”, it may indicate that transmission ofthe 4K broadcasting program using both the horizontal polarized signaland the vertical polarized signal in the layer is not executed. Byconfiguring it in this manner, it is possible to identify whether thetransmission of the 4K broadcasting program is executed by using boththe horizontal polarized signal and the vertical polarized signal foreach of the B layer and the C layer or not by using the bit of the 4Ksignal transmission layer identification in the broadcast receivingapparatus 100.

Further, in a case where the broadcast wave to be transmitted is abroadcast wave of the layered division multiplexing terrestrial digitalbroadcasting service according to the present embodiment, the bit of the4K signal transmission layer identification may indicate whethertransmission of the 4K broadcasting program by the lower layer is to beexecuted or not. In a case where B119 of this parameter is “0”,transmission of the 4K broadcasting program by the lower layer isexecuted. In a case where B119 of this parameter is “1”, transmission ofthe 4K broadcasting program by the lower layer is not executed. Byconfiguring it in this manner, it is possible to identify whether thetransmission of the 4K broadcasting program by the lower layer by usingthe bit of the 4K signal transmission layer identification or not in thebroadcast receiving apparatus 100.

Note that in a case where this parameter is “0”, it is possible to adopta modulation method of NUC (Non-Uniform Constellation) in addition to abasic modulation method illustrated in FIG. 5C as the carrier modulationmapping method. In this case, it is possible to transmit the currentinformation/next information of transmission parameter additionalinformation regarding the B layer/C layer by using the AC1 and the like.

Further, in a case where the broadcast wave to be transmitted are notthe advanced terrestrial digital broadcasting service, each of theseparameters may be set to “1”.

Note that the definition of “0” and “1” of the bit of the 4K signaltransmission layer identification explained above may be the reverse ofthe explanation described above.

FIG. 5J illustrates one example of bit allocation of the additionallayer transmission identification. A bit of the additional layertransmission identification may indicate that the broadcast wave to betransmitted is the dual-polarized terrestrial digital broadcastingservice according to the present embodiment and whether each of the Blayer and the C layer of the transmission wave to be transmitted by thesub polarized wave is used as a virtual D layer or a virtual E layer ornot.

For example, in the example of FIG. 5J, a bit arranged in B120 is a Dlayer transmission identification bit. In a case where this parameter is“0”, the B layer to be transmitted by the sub polarized wave is used asthe virtual D layer. This means that to be expressed precisely, a groupof segments each having the same segment number as the segment belongingto the B layer to be transmitted by the main polarized wave among thesegments to be transmitted by the sub polarized wave is treated as the Dlayer that is a different layer from the B layer to be transmitted bythe main polarized wave. In a case where this parameter is “1”, the Blayer to be transmitted by the sub polarized wave is not used as thevirtual D layer, but is used as the B layer.

Further, for example, a bit arranged in B121 is an E layer transmissionidentification bit. In a case where this parameter is “0”, the C layerto be transmitted by the sub polarized wave is used as the virtual Elayer. This means that to be expressed precisely, a group of segmentseach having the same segment number as the segment belonging to the Clayer to be transmitted by the main polarized wave among the segments tobe transmitted by the sub polarized wave is treated as the E layer thatis a different layer from the C layer to be transmitted by the mainpolarized wave. In a case where this parameter is “1”, the C layer to betransmitted by the sub polarized wave is not used as the virtual Elayer, but is used as the C layer.

By configuring it in this manner, it is possible to identify presence orabsence of the D layer and the E layer to be transmitted by the subpolarized wave by using the bit of the additional layer transmissionidentification (at least one of the D layer transmission identificationbit or the E layer transmission identification bit) in the broadcastreceiving apparatus 100. Namely, in terrestrial digital broadcastingaccording to the present embodiment, by using a parameter of theadditional layer transmission identification illustrated in FIG. 5J, itis possible to operate a new layer (in the example of FIG. 5J, the Dlayer and the E layer) beyond the number of layers that is limited tothree layers including the A layer, the B layer, and the C layer in theexisting terrestrial digital broadcasting.

Note that in a case where this parameter is “0”, it is possible todifferentiate parameters such as the carrier modulation mapping methodillustrated in FIG. 5C, the code rate, or the length of the timeinterleaving between the virtual D layer/virtual E layer and the Blayer/C layer. In this case, in a case where the currentinformation/next information of the parameters such as the carriermodulation mapping method regarding the virtual D layer/virtual E layer,the convolution code rate, or the length of the time interleaving istransmitted by using AC information (for example, the AC1), it ispossible to grasp the parameters such as the carrier modulation mappingmethod regarding the virtual D layer/virtual E layer, the convolutioncode rate, or the length of the time interleaving at the broadcastreceiving apparatus 100 side.

Note that as a modification example, in a case where the bit of theadditional layer transmission identification (at least one of the Dlayer transmission identification bit or the E layer transmissionidentification bit) is “0”, it may be configured so that thetransmission parameter of at least one of the B layer or the C layer ofthe current information/next information of the TMCC information to betransmitted by the sub polarized wave is switched to the meaning of thetransmission parameter of at least one of the virtual D layer or thevirtual E layer. In this case, in a case where at least one of thevirtual D layer or the virtual E layer is used, the A layer, the Blayer, and the C layer may be used in the main polarized wave, thetransmission parameter of these layers may be transmitted by the currentinformation/next information of the TMCC information to be transmittedby the main polarized wave. Further, the A layer, the D layer, and the Elayer may be used in the sub polarized wave, and the transmissionparameter of these layers may be transmitted by the currentinformation/next information of the TMCC information to be transmittedby the sub polarized wave. Even in this case, it is possible to graspthe parameters such as the carrier modulation mapping method regardingthe virtual D layer/virtual E layer, the convolution code rate, or thelength of the time interleaving at the broadcast receiving apparatus 100side.

Further, in a case where the broadcast wave to be transmitted is not theadvanced terrestrial digital broadcasting service or in a case where thelayered division multiplexing transmission method is used even in theadvanced terrestrial digital broadcasting service, it may be configuredso that this parameter is respectively set to “1”.

Note that the parameter of the additional layer transmissionidentification may be stored in both the TMCC information of the mainpolarized wave and the TMCC information of the sub polarized wave.However, any of the processes described above can be realized so long asthe parameter is stored at least in the TMCC information of the subpolarized wave.

Further, the definition of “0” and “1” of the bit of the additionallayer transmission identification explained above may be the reverse ofthe explanation described above.

Note that in a case where a parameter of the 4K signal transmissionlayer identification described above indicates that transmission of the4K broadcasting program is executed by the B layer, the broadcastreceiving apparatus 100 may ignore the D layer transmissionidentification bit even though the D layer transmission identificationbit described above indicates that the B layer is used as the virtual Dlayer. Similarly, in a case where the parameter of the 4K signaltransmission layer identification indicates that the transmission of the4K broadcasting program is executed by the C layer, the broadcastreceiving apparatus 100 may be configured so as to ignore the E layertransmission identification bit even though the E layer transmissionidentification bit indicates that the C layer is used as the virtual Elayer. By clarifying a priority order of the bits used in a determiningprocess, it is possible to prevent conflict of the determining processin the broadcast receiving apparatus 100.

Further, in the broadcast wave to be transmitted, all of the bit of thefrequency converting process identification described above, the bit ofthe physical channel number identification, the bit of the main signalidentification, a bit of 4K signal transmission identification, and thebit of the additional layer transmission identification may be set to“1” in principle in a case where the parameter of the systemidentification described above is not “10”. Even in a case where theparameter of the system identification is not “10” but exceptionally dueto a certain problem, any of the bit of the frequency converting processidentification, the bit of the physical channel number identification,the bit of the main signal identification, the bit of the 4K signaltransmission identification, and the bit of the additional layertransmission identification is not “1”, the broadcast receivingapparatus 100 may be configured so as to ignore the bit that is not “1”,and determine that all of these bits are “1”.

Further, in the advanced terrestrial digital broadcasting service of thedual-polarized transmission method, the TMCC information of thetransmission wave to be transmitted by the horizontal polarized wave andthe TMCC information of the transmission wave to be transmitted by thevertical polarized wave may be the same as each other, or may bedifferent from each other. Similarly, in the advanced terrestrialdigital broadcasting service of the layered division multiplexingtransmission method, the TMCC information of the transmission wave to betransmitted by the upper layer and the TMCC information of thetransmission wave to be transmitted by the lower layer may be the sameas each other, or may be different from each other. Further, theparameter of the frequency converting process identification describedabove, the parameter of the main signal identification, the parameter ofthe additional layer transmission identification may be described onlyin the TMCC information of the transmission wave to be transmitted bythe sub polarized wave or the transmission wave to be transmitted by thelower layer.

Note that in the explanation described above, the example in which theparameter of the frequency converting process identification, theparameter of the main signal identification, the parameter of thepolarization direction identification, the parameter of the firstsignal/second signal identification, the parameter of the upper/lowerlayer identification, the parameter of the 4K signal transmission layeridentification, and the parameter of the additional layer transmissionidentification are transmitted so as to be included in the TMCC signal(or the TMCC carrier) has been explained. However, these parameters maybe transmitted so as to be included in the AC signal (or the ACcarrier). Namely, these parameters may be transmitted by a signal of acarrier (such as the TMCC carrier or the AC carrier) modulated by amodulation method that executes mapping with a smaller number of statesthan that of the modulation method for the data carrier.

[AC Signal]

The AC signal is an additional information signal regarding thebroadcast, and includes additional information or seismic motion warninginformation regarding a transmission control of a modulation wave. Notethat the seismic motion warning information is transmitted by using anAC carrier with segment 0. On the other hand, the additional informationregarding the transmission control of the modulation wave can betransmitted by using an arbitrary AC carrier. FIG. 6A illustrates oneexample of bit allocation of the AC signal. The AC signal is configuredby 204 bits (B0 to B203). B0 is a demodulation reference signal for anAC symbol, and has a predetermined amplitude and a phase reference. B1to B3 are signals for identifying a configuration of the AC signal. B4to B203 are used for transmission of the additional information ortransmission of the seismic motion warning information regarding thetransmission control of the modulation wave.

FIG. 6B illustrates one example of bit allocation of configurationidentification of the AC signal. In a case where the seismic motionwarning information is transmitted by using B4 to B203 of the AC signal,this parameter is set to “001” or “110”. A parameter of theconfiguration identification (“001” or “110”) in case of transmission ofthe seismic motion warning information has the same code as leadingthree bits (B1 to B3) of a synchronization signal of the TMCC signal,and is sent out alternately for each frame at the same timing as theTMCC signal. Further, in a case where this parameter is a value otherthan the value described above, it indicates that the additionalinformation regarding the transmission control of the modulation wave istransmitted by using B4 to B203 of the AC signal. The additionalinformation regarding the transmission control of the modulation wavemay be transmitted by using B4 to B203 of the AC signal. In this case,as the parameter of the configuration identification of the AC signal,“000” and “111”, “010” and “101”, or “011” and “100” are sent outalternately for each frame.

B4 to B203 of the AC signal are used for transmission of the additionalinformation or transmission of the seismic motion warning informationregarding the transmission control of the modulation wave.

The transmission of the additional information regarding thetransmission control of the modulation wave may be executed by variousbit configurations. For example, the frequency converting processidentification, the physical channel number identification, the mainsignal identification, the 4K signal transmission layer identification,and the additional layer transmission identification, which have beendescribed in the explanation of the TMCC signal, the bit of theadditional information regarding the transmission control of themodulation wave of the AC signal may be allocated and transmitted inplace of the TMCC signal or in addition to the TMCC signal. Byconfiguring it in this manner, in the broadcast receiving apparatus 100,it is possible to execute various kinds of identifying processes usingthese parameters, which have already been described in the explanationof the TMCC signal. Further, the current/next information of thetransmission parameter additional information regarding the transmissionlayer of the 4K broadcasting program when any parameter of the 4K signaltransmission layer identification is “0” or the transmission parameterregarding the virtual D layer/virtual E layer when any parameter of theadditional layer transmission identification is “0” may be allocated. Byconfiguring it in this manner, in the broadcast receiving apparatus 100,it is possible to obtain the transmission parameter of each layer byusing these parameters, and this makes it possible to control thedemodulating process for each layer.

Transmission of the seismic motion warning information may be executedby bit allocation illustrated in FIG. 6C. The seismic motion warninginformation is configured by a synchronization signal, a start/end flag,update flag, signal identification, seismic motion warning detailedinformation, CRC, and parity bits. The synchronization signal isconfigured by a code with 13 bits, and has the same code as 13 bits (B4to B16) obtained by removing the leading three bits from thesynchronization signal of the TMCC signal. In a case where theconfiguration identification of the AC signal indicates that the seismicmotion warning information is to be transmitted, a code with 16 bitsobtained by combining the configuration identification with thesynchronization signal becomes the same synchronization words with 16bits as the synchronization signal of the TMCC. The start/end flag isconfigured by a code with two bits as a flag of start timing/end timingof the seismic motion warning information. The start/end flag is changedfrom “11” to “00” when sending of the seismic motion warning informationis started, and is changed from “00” to “11” when the sending of theseismic motion warning information is ended. The update flag isconfigured by a code with two bits, and is increased by “1” using “00”as an initial value every time the content of a series of seismic motionwarning detailed information to be transmitted when the start/end flagis “00” is changed. After “11”, it returns to “00”. In a case where thestart/end flag is “11”, the update flag is also “11”.

FIG. 6D illustrates one example of bit allocation of the signalidentification. The signal identification is configured by a code ofthree bits, and is used for identifying a type of the seismic motionwarning detailed information. In a case where this parameter is “000”,it means the “seismic motion warning detailed information (there is acorresponding region)”. In a case where this parameter is “001”, itmeans the “seismic motion warning detailed information (there is nocorresponding region)”. In a case where this parameter is “010”, itmeans “a test signal of the seismic motion warning detailed information(there is a corresponding region)”. In a case where this parameter is“011”, it means “the test signal of the seismic motion warning detailedinformation (there is no corresponding region)”. In a case where thisparameter is “111”, it means “no seismic motion warning detailedinformation”. Note that in a case where the start/end flag is “00”, thesignal identification becomes any of “000”, “001”, “010”, and “011”. Ina case where the start/end flag is “11”, the signal identificationbecomes “111”.

The seismic motion warning detailed information is configured by a codewith 88 bits. In a case where the signal identification is any of “000”,“001”, “010”, and “011”, information such as information regarding acurrent time when the seismic motion warning information is sent out,information indicating a region that becomes a target of seismic motionwarning, or latitude/longitude/earthquake intensity of a seismic centerof earthquake that becomes a target of the seismic motion warning istransmitted as the seismic motion warning detailed information. FIG. 6Eillustrates one example of bit allocation of the seismic motion warningdetailed information in a case where the signal identification is any of“000”, “001”, “010”, and “011”. Further, in a case where the signalidentification is “111”, it is possible to transmit a code or the likefor identifying a broadcaster by using a bit of the seismic motionwarning detailed information. FIG. 6F illustrates one example of bitallocation of the seismic motion warning detailed information in a casewhere the signal identification is “111”.

The CRC is a code generated by using a predetermined generatorpolynomial with respect to B21 to B111 of the seismic motion warninginformation. The parity bit is a code generated by a shortened code(187, 105) of a difference set cyclic code (273, 191) with reference toB17 to B121 of the seismic motion warning information.

In the broadcast receiving apparatus 100, it is possible to executevarious kinds of controls for addressing an emergency situation by usingthe parameters regarding the seismic motion warning, which have beendescribed in FIG. 6C, FIG. 6D, FIG. 6E, and FIG. 6F. For example, it ispossible to execute a presentation control of information regarding theseismic motion warning, a control to switch display content with lowpriority into display regarding the seismic motion warning, and acontrol to terminate display of an application and switch into displayregarding the seismic motion warning or broadcasting program video.

FIG. 6G illustrates one example of bit allocation of the additionalinformation regarding the transmission control of the modulation wave.The additional information regarding the transmission control of themodulation wave is configured by the synchronization signal, the currentinformation, the next information, and the parity bit. Thesynchronization signal is configured by a code with 13 bits, and has thesame code as 13 bits (B4 to B16) obtained by removing the leading threebits from the synchronization signal of the TMCC signal. In a case wherethe configuration identification of the AC signal indicates that theadditional information regarding the transmission control of themodulation wave is to be transmitted, a code with 16 bits obtained bycombining the configuration identification and the synchronizationsignal becomes synchronization words with 16 bits equivalent to thesynchronization signal of the TMCC. The current information indicatescurrent information of the transmission parameter additional informationwhen the 4K broadcasting program is transmitted by the B layer or the Clayer and the transmission parameter regarding the virtual D layer orthe virtual E layer. The next information indicates information afterswitching of the transmission parameter additional information when the4K broadcasting program is transmitted by the B layer or the C layer andthe transmission parameter regarding the virtual D layer or the virtualE layer.

In the example of FIG. 6G, B18 to B30 of the current information arecurrent information of the B layer transmission parameter additionalinformation, and indicate current information of the transmissionparameter additional information when the 4K broadcasting program is tobe transmitted by the B layer. Further, B31 to B43 of the currentinformation are current information of the C layer transmissionparameter additional information, and indicate current information ofthe transmission parameter additional information when the 4Kbroadcasting program is to be transmitted by the C layer. Further, B70to B82 of the next information are information after switching of thetransmission parameters of the B layer transmission parameter additionalinformation, and indicate information after switching of thetransmission parameters of the transmission parameter additionalinformation when the 4K broadcasting program is to be transmitted by theB layer. Further, B83 to B95 of the next information are informationafter switching of the transmission parameters of the C layertransmission parameter additional information, and indicate informationafter switching of the transmission parameters of the transmissionparameter additional information when the 4K broadcasting program is tobe transmitted by the C layer. Here, the transmission parameteradditional information is a transmission parameter regarding modulation,which is added to the transmission parameter of the TMCC informationillustrated in FIG. 5C to extend the specifications. The concretecontent of the transmission parameter additional information will bedescribed later.

In the example illustrated in FIG. 6G, B44 to B56 of the currentinformation are current information of the transmission parameter forthe virtual D layer in a case where the virtual D layer is operated. B57to B69 of the current information are current information of thetransmission parameter for the virtual E layer in a case where thevirtual E layer is operated. Further, B96 to B108 of the nextinformation are information after switching of the transmissionparameters for the virtual D layer in a case where the virtual D layeris operated. B109 to B121 of the current information are informationafter switching of the transmission parameters for the virtual E layerin a case where the virtual E layer is operated. The parameters storedin the transmission parameter for the virtual D layer and thetransmission parameter for the virtual E layer may be the similar tothose illustrated in FIG. 5C.

The virtual D layer and the virtual E layer are layers that do not existin the existing terrestrial digital broadcasting. It is not easy toincrease the number of bits of the TMCC information illustrated in FIG.5B because it is necessary to maintain compatibility with the existingterrestrial digital broadcasting. Therefore, in the embodiment accordingto the present invention, the transmission parameters for the virtual Dlayer and the virtual E layer are not stored in the TMCC information,but are stored in the AC information as illustrated in FIG. 6G.

This makes it possible to transmit, to the receiving apparatus,information on modulation for the new virtual D layer and the newvirtual E layer while maintaining compatibility of the TMCC informationwith the existing terrestrial digital broadcasting. As a result, in thebroadcast wave of the dual-polarized terrestrial digital broadcastingservice according to the present embodiment, in a case where the Blayer/C layer of the transmission wave to be transmitted by the subpolarized wave is used as the virtual D layer/virtual E layer, it ispossible to set the transmission parameter of the virtual Dlayer/virtual E layer of the transmission wave to be transmitted by thesub polarized wave so as to be differentiated from the transmissionparameter of the B layer/C layer of the transmission wave to betransmitted by the main polarized wave.

Note that in a case where the virtual D layer or the virtual E layer isnot used, information on the transmission parameter for the unused layermay be ignored by the broadcast receiving apparatus 100 without anyproblem. For example, in a case where the parameter of the additionallayer transmission identification of the TMCC information illustrated inFIG. 5J indicates “1” for the virtual D layer or the virtual E layer (ina case where it indicates that the virtual D layer/virtual E layer isnot used), the broadcast receiving apparatus 100 may be configured so asto ignore the information on the transmission parameter even though anyvalue is contained in the transmission parameter illustrated in FIG. 6Gfor the unused virtual D layer or the unused virtual E layer.

Next, details of the transmission parameter additional information,which has been explained with reference to FIG. 6G, will be described.

FIG. 6H illustrates one concrete example of the transmission parameteradditional information. it is possible to contain a parameter of anerror correcting method, a parameter of a constellation form, and thelike in the transmission parameter additional information.

The error correcting method indicates setting of what kind of codingmethod is used as the error correcting method for the inner code and theouter code when the 4K broadcasting program (the advanced terrestrialdigital broadcasting service) is to be transmitted by the B layer or theC layer. FIG. 6I illustrates one example of bit allocation of the errorcorrecting method. In a case where this parameter is “000”, aconvolution code is used as the inner code and a shortened RS code isused as the outer code when the 4K broadcasting program is to betransmitted by the B layer or the C layer. In a case where thisparameter is “001”, the LDPC code is used as the inner code and the BCHcode is used as the outer code when the 4K broadcasting program is to betransmitted by the B layer and the C layer. Moreover, the othercombinations may be set so that they can be selected.

Further, when the 4K broadcasting program is transmitted by the B layerand the C layer, it is possible to adopt not only a uniformconstellation but also a non-uniform constellation (Non UniformConstellation: NUC) as the carrier modulation mapping method. FIG. 6Jillustrates one example of bit allocation of the constellation form. Ina case where this parameter is “000”, the carrier modulation mappingmethod selected in the transmission parameter of the TMCC information isapplied to the uniform constellation. In a case where this parameter isany of “001” to “111”, the carrier modulation mapping method selected inthe transmission parameter of the TMCC information is applied to thenon-uniform constellation. Note that in a case where the non-uniformconstellation is to be applied, the optimum value of the non-uniformconstellation differs depending upon the type of the error correctingmethod and a code rate thereof. Therefore, in a case where the parameterof the constellation form is any of “001” to “111”, the broadcastreceiving apparatus 100 according to the present embodiment maydetermine the non-uniform constellation used in the demodulating processon the basis of the parameter of the carrier modulation mapping method,the parameter of the error correcting method, and the parameter of thecode rate thereof. This determination may be made by referring to apredetermined table that the broadcast receiving apparatus 100 stores inadvance.

[Transmission Method 1 of Advanced Terrestrial Digital BroadcastingService]

In order to realize 4K (3840 horizontal pixels×2160 vertical pixels)broadcasting while maintaining viewing environment of the existingterrestrial digital broadcasting service, the dual-polarizedtransmission method will be described as one example of the transmissionmethod of the advanced terrestrial digital broadcasting serviceaccording to the embodiment of the present invention. The dual-polarizedtransmission method according to the embodiment of the present inventionis a method that has specifications common to some specifications of theexisting terrestrial digital broadcasting method. For example, 13segments in about 6 MHz band corresponding to one physical channel aredivided, and seven segments, five segments, and one segment arerespectively allocated to transmission of a 2K (1920 horizontalpixels×1080 vertical pixels) broadcasting program, transmission of a 4Kbroadcasting program, and mobile reception (so-called one-segmentbroadcasting). Moreover, the five segments for the 4K broadcasting usenot only the horizontal polarized signal but also the vertical polarizedsignal to secure a transmission capacity for total ten segments by aMIMO (Multiple-Input Multiple-Output) technique. Note that the 2Kbroadcasting program maintains image quality by optimizing the latestMPEG-2 Video compression technique, and can be received even by anexisting television receiver. For the 4K broadcasting program, imagequality is secured by optimization of a more high-efficient HEVCcompression technique than MPEG-2 Video and multi-valued modulation.Note that the number of segments allocated for each broadcast may bedifferent from the above.

FIG. 7A illustrates one example of the dual-polarized transmissionmethod in the advanced terrestrial digital broadcasting serviceaccording to the embodiment of the present invention. A frequency bandof 470 to 710 MHz is used for transmission of the broadcast wave of theterrestrial digital broadcasting service. The number of physicalchannels in the frequency band is 40 channels of 13 to 52 ch, each ofthe physical channels has a bandwidth of 6 MHz. In the dual-polarizedtransmission method according to the embodiment of the presentinvention, both the horizontal polarized signal and the verticalpolarized signal are used in one physical channel.

FIG. 7A illustrates two examples of (1) and (2) as an allocation exampleof 13 segments. In the example of (1), transmission of a 2K broadcastingprogram is executed by using segments 1 to 7 (the B layer) of thehorizontal polarized signal. Transmission of a 4K broadcasting programis executed by using total ten segments of segments 8 to 12 (the Clayer) of the horizontal polarized signal and segments 8 to 12 (the Clayer) of the vertical polarized signal. The segments 1 to 7 (the Blayer) of the vertical polarized signal may be used for transmission ofthe same broadcasting program as the 2K broadcasting program to betransmitted by the segments 1 to 7 (the B layer) of the horizontalpolarized signal. Alternatively, the segments 1 to 7 (the B layer) ofthe vertical polarized signal may be used for transmission of adifferent broadcasting program from the 2K broadcasting program to betransmitted by the segments 1 to 7 (the B layer) of the horizontalpolarized signal. Alternatively, the segments 1 to 7 (the B layer) ofthe vertical polarized signal may be used for the other datatransmission, or may not be used. Identification information of how touse the segments 1 to 7 (the B layer) of the vertical polarized signalcan be transmitted to the receiving apparatus side by the parameter ofthe 4K signal transmission layer identification or the parameter of theadditional layer transmission identification of the TMCC signal, whichhas already been explained. In the broadcast receiving apparatus 100, itis possible to identify handling of the segments 1 to 7 (the B layer) ofthe vertical polarized signal by these parameters. Further, the 2Kbroadcasting program to be transmitted by using the B layer of thehorizontal polarized signal and the 4K broadcasting program to betransmitted by using the C layers of both horizontal/vertical polarizedsignals may be simultaneous broadcasting (simulcast) in which abroadcasting program with the same content is transmitted with differentresolutions, or may be one in which a broadcasting program withdifferent content is transmitted. In the segment 0 of bothhorizontal/vertical polarized signals, transmission of the sameone-segment broadcasting program is executed.

The example illustrated in (2) of FIG. 7A is a modification exampledifferent from (1). In the example of (2), transmission of a 4Kbroadcasting program is executed by using total ten segments of segments1 to 5 (the B layer) of the horizontal polarized signal and segments 1to 5 (the B layer) of the vertical polarized signal. Transmission of a2K broadcasting program is executed by using segments 6 to 12 (the Clayer) of the horizontal polarized signal. Even in the example of (2),the segments 6 to 12 (the C layer) of the vertical polarized signal maybe used for transmission of the same broadcasting program as the 2Kbroadcasting program to be transmitted by the segments 6 to 12 (the Clayer) of the horizontal polarized signal. The segments 6 to 12 (the Clayer) of the vertical polarized signal may be used for transmission ofa different broadcasting program from the 2K broadcasting program to betransmitted by the segments 6 to 12 (the C layer) of the horizontalpolarized signal. Further, the segments 6 to 12 (the C layer) of thevertical polarized signal may be used for the other data transmission,or may not be used. These kinds of identification information aresimilar to those in the example of (1). For this reason, repeatedexplanation thereof is omitted.

Note that in any of the examples illustrated in (1) and (2) of FIG. 7A,a case where the horizontal polarized wave is the main polarized wavehas been described as an example, but the horizontal polarized wave andthe vertical polarized wave may be reversed depending upon the operationthereof.

FIG. 7B illustrates one example of a configuration of a broadcastingsystem for the advanced terrestrial digital broadcasting service usingthe dual-polarized transmission method according to the embodiment ofthe present invention. This illustrates both a system at a transmissionside and a system at a reception side of the advanced terrestrialdigital broadcasting service using the dual-polarized transmissionmethod. A configuration of the broadcasting system of the advancedterrestrial digital broadcasting service using the dual-polarizedtransmission method is basically similar to the configuration of thebroadcasting system illustrated in FIG. 1 . However, a radio tower 300Tthat is facility of the broadcast station is a dual polarizedtransmission antenna capable of sending out the horizontal polarizedsignal and the vertical polarized signal at the same time. Further, inthe example of FIG. 7B, only the tuning/wave detector 131H and thetuning/wave detector 131V of the second tuner/demodulator 130T in thebroadcast receiving apparatus 100 are extracted and illustrated, and theother operating units are omitted.

The horizontal polarized signal sent out from the radio tower 300T isreceived by a horizontal polarized wave receiving element of the antenna200T that is a dual polarized reception antenna, and is inputted intothe tuning/wave detector 131H from a connector 100F1 via a coaxial cable202T1. On the other hand, the vertical polarized signal sent out fromthe radio tower 300T is received by a vertical polarized wave receivingelement of the antenna 200T, and is inputted into the tuning/wavedetector 131V from a connector 100F2 via a coaxial cable 202T2. An Ftype connector is generally used as a connector that connects an antenna(for example, a coaxial cable) and a television receiver.

Here, the user may mistakenly connect the coaxial cable 202T1 to theconnector 100F2, and connect the coaxial cable 202T2 to the connector100F1. In this case, in the tuning/wave detector 131H and thetuning/wave detector 131V, there is a possibility that a defect such asbeing unable to identify whether the inputted broadcasting signal is thehorizontal polarized signal or the vertical polarized signal. In orderto prevent the defect described above, it is considered that one of theconnectors each of which connects the antenna (coaxial cable) to thetelevision receiver, for example, the connector between the coaxialcable 202T2 and the connector 100F2 via which the vertical polarizedsignal is to be transmitted is a connector with a different shape otherthan that of the F type connector of the connector between the coaxialcable 202T1 and the connector 100F1 via which the horizontal polarizedsignal is to be transmitted. Alternatively, each of the tuning/wavedetector 131H and the tuning/wave detector 131V may refer to the mainsignal identification of the TMCC information of each input signal tocontrol the operation thereof so as to identify whether the inputtedbroadcasting signal is the horizontal polarized signal or the verticalpolarized signal.

FIG. 7C illustrates one example of a configuration example differentfrom the configuration of the broadcasting system described above forthe advanced terrestrial digital broadcasting service using thedual-polarized transmission method according to the embodiment of thepresent invention. The configuration as illustrated in FIG. 7B in whichthe broadcast receiving apparatus 100 includes two connectors forinputting broadcasting signals and two coaxial cables are used toconnect the antenna 200T to the broadcast receiving apparatus 100 maynot always be suitable for the cost of facility and handling at the timeof cable wiring. Therefore, in the configuration illustrated in FIG. 7C,the horizontal polarized signal received by the horizontal polarizedwave receiving element of the antenna 200T and the vertical polarizedsignal received by the vertical polarized wave receiving element of theantenna 200T are inputted into the converter (converting unit) 201T, andconnection between the converter 201T and the broadcast receivingapparatus 100 is executed by a single coaxial cable 202T3. Abroadcasting signal inputted from a connector 100F3 is demultiplexed andinputted into the tuning/wave detector 131H and the tuning/wave detector131V. The connector 100F3 may have a function to supply operating powerto the converter 201T.

The converter 201T may belong to facility in an environment (forexample, an apartment house or the like) in which the broadcastreceiving apparatus 100 is installed. Alternatively, the converter 201Tmay be configured as a device integrated with the antenna 200T, andinstalled in a house or the like. The converter 201T executes afrequency converting process for any one of the horizontal polarizedsignal received by the horizontal polarized wave receiving element ofthe antenna 200T and the vertical polarized signal received by thevertical polarized wave receiving element of the antenna 200T. By thisprocess, the horizontal polarized signal and the vertical polarizedsignal transmitted from the radio tower 300T to the antenna 200T can beseparated into different frequency bands from each other by using thehorizontal polarized wave and the vertical polarized wave of the samefrequency band, and may be transmitted to the broadcast receivingapparatus 100 by the single coaxial cable 202T3 at the same time. Notethat if necessary, the frequency converting process may be executed forboth the horizontal polarized signal and the vertical polarized signal,but in this case, the frequency bands of the both after frequencyconversion have to be different from each other. Further, the broadcastreceiving apparatus 100 may include one connector 100F3 for inputtingthe broadcasting signal.

FIG. 7D illustrates one example of the frequency converting process. Inthis example, the frequency converting process is executed for thevertical polarized signal. Specifically, of a horizontal polarizedsignal and a vertical polarized signal transmitted by a frequency bandof 470 to 710 MHz (that is, a band corresponding to 13 ch to 52 ch ofUHF), a frequency band of the vertical polarized signal is convertedfrom the frequency band of 470 to 710 MHz to a frequency band of 770 to1010 MHz. By this process, it is possible to transmit signalstransmitted by using the horizontal polarized wave and the verticalpolarized wave with the same frequency band to the broadcast receivingapparatus 100 through the coaxial cable 202T3 at the same time withoutinterfering with each other. Note that the frequency converting processmay be executed for the horizontal polarized signal.

Further, it is preferable that the frequency converting process isexecuted for the signal transmitted by the sub polarized wave inaccordance with a result obtained by referring to the main signalidentification of the TMCC information. As explained with reference toFIG. 5H, the signal transmitted by the main polarized wave is morelikely to be transmitted so as to include the existing terrestrialdigital broadcasting service compared with the signal transmitted by thesub polarized wave. Therefore, in order to maintain compatibility withthe existing terrestrial digital broadcasting service more suitably, itis preferable that a frequency of the signal transmitted by the mainpolarized wave is not converted, but a frequency of the signaltransmitted by the sub polarized wave is converted.

Further, in a case where the frequency of the signal transmitted by thesub polarized wave is converted, it is desirable that a frequency bandof the signal transmitted by the sub polarized wave is set to be higherthan a frequency band of the signal transmitted by the main polarizedwave in the signals after conversion. As a result, by starting a scanfrom a low frequency side and causing the scan to proceed to a highfrequency side in the initial scan of the broadcast receiving apparatus100, it is possible to execute the initial scan for the signaltransmitted by the main polarized wave prior to that for the signaltransmitted by the sub polarized wave. This makes it possible to executea process of reflecting settings by the initial scan of the existingterrestrial digital broadcasting service to settings by the initial scanof the advanced terrestrial digital broadcasting service more suitably.

Further, the frequency converting process may be executed for allphysical channels used in the advanced terrestrial digital broadcastingservice, but may be executed only for a physical channel using signaltransmission by the dual-polarized transmission method.

Note that it is preferable that the frequency band after conversion bythe frequency converting process is between 710 and 1032 MHz. Namely, ina case where the terrestrial digital broadcasting service and a BS/CSdigital broadcasting service are to be received at the same time, it isconceivable that the broadcasting signal of the terrestrial digitalbroadcasting service received by the antenna 200T and the broadcastingsignal of the BS/CS digital broadcasting service received by the antenna200B are mixed and transmitted to the broadcast receiving apparatus 100with a single coaxial cable. In this case, a BS/CS-IF signal uses afrequency band of about 1032 to 2150 MHz. For this reason, by settingthe frequency band after conversion by the frequency converting processto be between 710 and 1032 MHz, it becomes possible to avoidinterference between the broadcasting signal of the terrestrial digitalbroadcasting service and the broadcasting signal of the BS/CS digitalbroadcasting service while avoiding interference between the horizontalpolarized signal and the vertical polarized signal. Further, in case ofconsidering reception of a retransmission broadcasting signal by a cabletelevision (Community Antenna TV or Cable TV: CATV) station, a frequencyband of 770 MHz or less (a band corresponding to 62 ch or less of theUHF) is used in television broadcasting distribution by the cabletelevision station. For this reason, it is more preferable that thefrequency band after conversion by the frequency converting process isset to be between 770 and 1032 MHz, which exceeds the band correspondingto 62 ch of the UHF.

Further, it is preferable that a bandwidth of a range between thefrequency band before conversion by the frequency converting process andthe frequency band after conversion (that is, “a” portion in FIG. 7D) isset to be an integral multiple of the bandwidth (6 MHz) of one physicalchannel. By configuring it in this manner, in the broadcast receivingapparatus 100, there is an advantage that a frequency setting controlbecomes easy in a case where a frequency of the broadcasting signal ofthe frequency band before conversion by the frequency converting processand a frequency of the broadcasting signal of the frequency band afterconversion are collectively scanned.

Note that as described above, in the dual-polarized transmission methodaccording to the embodiment of the present invention, both thehorizontal polarized signal and the vertical polarized signal are usedfor transmission of the 4K broadcasting program. Therefore, in order toreproduce the 4K broadcasting program correctly, it is necessary for thereception side to correctly grasp a combination of physical channelsbetween the broadcasting signal transmitted by the horizontal polarizedwave and the broadcasting signal transmitted by the vertical polarizedwave. Even in a case where the frequency converting process is executedand the broadcasting signal transmitted by the horizontal polarized waveand the broadcasting signal transmitted by the vertical polarized wavefor the same physical channel are inputted into the receiving apparatusas signals of different frequency bands, in the broadcast receivingapparatus 100 according to the present embodiment, by appropriatelyreferring to the parameters of the TMCC information illustrated in FIG.5F to FIG. 5J (for example, the main signal identification and thephysical channel number identification), it is possible to correctlygrasp the combination of the broadcasting signal transmitted by thehorizontal polarized wave and the broadcasting signal transmitted by thevertical polarized wave for the same physical channel. This makes itpossible to suitably receive, demodulate, and reproduce the 4Kbroadcasting program in the broadcast receiving apparatus 100 accordingto the present embodiment.

Note that in any of the examples illustrated in FIG. 7B, FIG. 7C, andFIG. 7D, a case where the horizontal polarized wave is the mainpolarized wave has been described as an example, but the horizontalpolarized wave and the vertical polarized wave may be reversed dependingupon the operation thereof.

Note that as described above, the broadcast wave of the terrestrialdigital broadcasting to be transmitted by the dual-polarizedtransmission method explained above can be received and reproduced bythe second tuner/demodulator 130T of the broadcast receiving apparatus100, but is received even by the first tuner/demodulator 130C of thebroadcast receiving apparatus 100. In a case where the broadcast wave ofthe terrestrial digital broadcasting is received by the firsttuner/demodulator 130C, the broadcasting signal transmitted by the layerfor the advanced terrestrial digital broadcasting service of thebroadcasting signals of the broadcast wave of the terrestrial digitalbroadcasting is ignored, but the broadcasting signal transmitted by thelayer for the existing terrestrial digital broadcasting service isreproduced.

<Pass-Through Transmission Method of Advanced Terrestrial DigitalBroadcasting Service>

The broadcast receiving apparatus 100 can receive a signal transmittedby a pass-through transmission method. The pass-through transmissionmethod is a method in which a broadcasting signal received by the cabletelevision station or the like is sent out to a distribution system of aCATV at the same frequency or via frequency conversion by a signalmethod as it is.

The pass-through transmission method includes: (1) a method of executingtransmission signal band extraction and level adjustment for eachterrestrial digital broadcasting signal outputted from a terrestrialreception antenna, and transmitting the terrestrial digital broadcastingsignal to a CATV facility at the same frequency as a transmission signalfrequency; and (2) a method of executing the transmission signal bandextraction and the level adjustment for each terrestrial digitalbroadcasting signal outputted from the terrestrial reception antenna,and transmitting the terrestrial digital broadcasting signal to the CATVfacility at a frequency for any of a VHF band, a MID band, a SHB band,and a UHF band, which is set by a CATV facility manager. Equipmentconstituting a reception amplifier for executing signal processing ofthe first method or equipment constituting a reception amplifier and afrequency converter for executing signal processing of the second methodis an OFDM signal processor (OFDM Signal Processor: OFDM-SP).

FIG. 7E illustrates one example of a system configuration in a casewhere the first method of the pass-through transmission method isapplied to the advanced terrestrial digital broadcasting service of thedual-polarized transmission method. FIG. 7E illustrates a headendfacility 400C and the broadcast receiving apparatus 100 of the cabletelevision station. Further, FIG. 7F illustrates one example of thefrequency converting process at that time. A notation (H/V) in FIG. 7Findicates a state where both a broadcasting signal transmitted by ahorizontal polarized wave and a broadcasting signal transmitted by avertical polarized wave are broadcasting signals that exist in the samefrequency band. A notation (H) indicates the broadcasting signaltransmitted by the horizontal polarized wave, and a notation (V)indicates the broadcasting signal transmitted by the vertical polarizedwave. Notations in FIG. 7H and FIG. 7I described below respectively havethe similar meanings.

In a case where the pass-through transmission of the first method isapplied to the advanced terrestrial digital broadcasting service of thedual-polarized transmission method according to the embodiment of thepresent invention, the transmission signal band extraction and the leveladjustment are executed for the broadcasting signal transmitted by thehorizontal polarized wave in the headend facility 400C of the cabletelevision station, and the broadcasting signal is sent out at the samefrequency as the transmission signal frequency. On the other hand, thetransmission signal band extraction and the level adjustment areexecuted for the broadcasting signal transmitted by the verticalpolarized wave in the headend facility 400C of the cable televisionstation, and the broadcasting signal is sent out after the similarfrequency converting process to that described with reference to FIG. 7D(that is, the process of converting the broadcasting signal transmittedby the vertical polarized wave into a frequency band higher than thefrequency band of 470 to 770 MHz, which is the band corresponding to 13ch to 62 ch of the UHF) is executed. This process causes frequency bandsof the broadcasting signal transmitted by the horizontal polarized waveand the broadcasting signal transmitted by the vertical polarized wavenot to be overlapped. For this reason, signal transmission by onecoaxial cable (or one optical fiber cable) becomes possible. Thetransmitted signal can be received by the broadcast receiving apparatus100 according to the present embodiment. A process of receiving anddemodulating the broadcasting signal transmitted by the horizontalpolarized wave and the broadcasting signal transmitted by the verticalpolarized wave included in the signal by the broadcast receivingapparatus 100 according to the present embodiment is similar to thatdescribed with reference to FIG. 7D. For this reason, repeatedexplanation thereof is omitted.

FIG. 7G illustrates one example of a system configuration in a casewhere the second method of the pass-through transmission method isapplied to the advanced terrestrial digital broadcasting service of thedual-polarized transmission method. FIG. 7G illustrates the headendfacility 400C and the broadcast receiving apparatus 100 of the cabletelevision station. Further, FIG. 7H illustrates one example of thefrequency converting process at that time.

In a case where the pass-through transmission of the second method isapplied to the advanced terrestrial digital broadcasting service of thedual-polarized transmission method according to the embodiment of thepresent invention, the transmission signal band extraction and the leveladjustment are executed for the broadcasting signal transmitted by thehorizontal polarized wave in the headend facility 400C of the cabletelevision station, and the broadcasting signal is sent out after thefrequency converting process into the frequency set by the CATV facilitymanager is executed. On the other hand, the transmission signal bandextraction and the level adjustment are executed for the broadcastingsignal transmitted by the vertical polarized wave in the headendfacility 400C of the cable television station, and the broadcastingsignal is sent out after the similar frequency converting process tothat described with reference to FIG. 7D (that is, the process ofconverting the broadcasting signal transmitted by the vertical polarizedwave into the frequency band higher than the frequency band of 470 to770 MHz, which is the band corresponding to 13 ch to 62 ch of the UHF)is executed. The frequency converting process illustrated in FIG. 7H isdifferent from that illustrated in FIG. 7F, and is one in which thefrequency of the broadcasting signal transmitted by the horizontalpolarized wave is converted so as to be rearranged in a range of 90 to770 MHz, which is expanded to a lower frequency band without limitingthe frequency band of 470 to 770 MHz that is the band of 13 ch to 62 chof the UHF. This process causes frequency bands of the broadcastingsignal transmitted by the horizontal polarized wave and the broadcastingsignal transmitted by the vertical polarized wave not to be overlapped.For this reason, signal transmission by one coaxial cable (or oneoptical fiber cable) becomes possible. The transmitted signal can bereceived by the broadcast receiving apparatus 100 according to thepresent embodiment. A process of receiving and demodulating thebroadcasting signal transmitted by the horizontal polarized wave and thebroadcasting signal transmitted by the vertical polarized wave includedin the signal by the broadcast receiving apparatus 100 according to thepresent embodiment is similar to that described with reference to FIG.7D. For this reason, repeated explanation thereof is omitted.

Further, as another modification example of the frequency convertingprocess for the headend facility 400C of the cable television stationillustrated in FIG. 7G, the broadcasting signal at the time ofpass-through output after the frequency conversion may be changed intoany of states respectively illustrated in FIG. 7H and FIG. 7I. In thiscase, the transmission signal band extraction and the level adjustmentmay be executed for both the broadcasting signal transmitted by thehorizontal polarized wave and the broadcasting signal transmitted by thevertical polarized wave, and the broadcasting signals may be sent outafter the frequency converting process into the frequency set by theCATV facility manager is executed. In the example of FIG. 7I, frequencyconversion is executed so that both the broadcasting signal transmittedby the horizontal polarized wave and the broadcasting signal transmittedby the vertical polarized wave are rearranged in a range of 90 to 770MHz (that is, a range from VHF 1 ch to UHF 62 ch). Since any frequencyband of a range that exceeds UHF 62 ch is not used, frequency bandutilization efficiency of the broadcasting signal can be heightenedcompared with the case illustrated in FIG. 7H.

Further, the band in which the broadcasting signals are rearranged iswider than the frequency band of 470 to 710 MHz that is the band of 13ch to 52 ch of the UHF at the time of reception by the antenna, asillustrated in the example of FIG. 7I, it is possible to alternatelyrearrange the broadcasting signal transmitted by the horizontalpolarized wave and the broadcasting signal transmitted by the verticalpolarized wave. At this time, as illustrated in the example of FIG. 7I,by alternately rearranging a pair of the broadcasting signal transmittedby the horizontal polarized wave and the broadcasting signal transmittedby the vertical polarized wave, which were in the same physical channelat the time of reception by the antenna, in the order of the physicalchannels at the time of reception by the antenna, in a case where thebroadcast receiving apparatus 100 according to the present embodimentexecutes the initial scan from the low frequency side, it is possible toproceed with initial settings for the pair of the broadcasting signaltransmitted by the horizontal polarized wave and the broadcasting signaltransmitted by the vertical polarized wave, which are originally in thesame physical channel, in order by originally the same physical channelunit, and this makes it possible to execute the initial scanefficiently.

Note that in any of the examples illustrated in FIG. 7E, FIG. 7F, FIG.7G, FIG. 7H, and FIG. 7I, a case where the horizontal polarized wave isthe main polarized wave has been described as an example, but thehorizontal polarized wave and the vertical polarized wave may bereversed depending upon the operation thereof.

Note that as described above, the broadcast wave of the terrestrialdigital broadcasting of the dual-polarized transmission method, to whichthe pass-through transmission method explained above was made, can bereceived and reproduced by the second tuner/demodulator 130T of thebroadcast receiving apparatus 100, but it can be received even by thefirst tuner/demodulator 130C of the broadcast receiving apparatus 100.In a case where the broadcast wave of the terrestrial digitalbroadcasting is received by the first tuner/demodulator 130C, thebroadcasting signal transmitted by the layer for the advancedterrestrial digital broadcasting service of the broadcasting signals ofthe broadcast wave of the terrestrial digital broadcasting is ignored,but the broadcasting signal transmitted by the layer for the existingterrestrial digital broadcasting service is reproduced.

[Transmission Method 2 of Advanced Terrestrial Digital BroadcastingService]

In order to realize the 4K broadcasting while maintaining the viewingenvironment of the existing terrestrial digital broadcasting service, asone example different from that described above of the transmissionmethod of the advanced terrestrial digital broadcasting serviceaccording to the embodiment of the present invention, the layereddivision multiplexing transmission method will be described. The layereddivision multiplexing transmission method according to the embodiment ofthe present invention is a method that has specifications common to somespecifications of the existing terrestrial digital broadcasting method.For example, a broadcast wave of a 4K broadcasting service whose signallevel is a low level is multiplexed into the same channel as thebroadcast wave of an existing 2K broadcasting service, and then istransmitted. Note that the 2K broadcasting is received as before bysuppressing a reception level of the 4K broadcasting to a required C/Nor less. With respect to the 4K broadcasting, a 2K broadcast wave iscancelled using a receiving technique compatible with an LDM (layereddivision multiplexing) technique while expanding a transmission capacityby multi-valued modulation or the like, and the 4K broadcasting isreceived through the remaining 4K broadcast wave.

FIG. 8A illustrates one example of the layered division multiplexingtransmission method in the advanced terrestrial digital broadcastingservice according to the embodiment of the present invention. An upperlayer is configured by a modulation wave of the existing 2Kbroadcasting, and a lower layer is configured by a modulation wave ofthe 4K broadcasting. Then, the upper layer and the lower layer aremultiplexed, and are outputted as a synthetic wave. For example, theymay be configured so that 64 QAM or the like is used as the modulationmethod in the upper layer and 256 QAM or the like is used as themodulation method in the lower layer. Note that a 2K broadcastingprogram to be transmitted using the upper layer and a 4K broadcastingprogram to be transmitted using the lower layer may be the simultaneousbroadcasting in which the broadcasting program with the same content istransmitted at different resolutions, or may be one in whichbroadcasting programs with different content are transmitted.

FIG. 8B illustrates one example of a configuration of a broadcastingsystem for the advanced terrestrial digital broadcasting service usingthe layered division multiplexing transmission method according to theembodiment of the present invention. The configuration of thebroadcasting system of the advanced terrestrial digital broadcastingservice using the layered division multiplexing transmission method isbasically similar to the configuration of the broadcasting systemillustrated in FIG. 1 . However, a radio tower 300L that is facility ofthe broadcast station is a transmission antenna configured to send out abroadcasting signal obtained by multiplexing the 2K broadcasting of theupper layer and the 4K broadcasting of the lower layer. Further, in theexample of FIG. 8B, only the tuning/wave detector 131L of the thirdtuner/demodulator 130L in the broadcast receiving apparatus 100 isextracted and illustrated, and the other operating units are omitted.

A broadcasting signal received by the antenna 200L is inputted from aconnector 100F4 to the tuning/wave detector 131L via a converter(converter) 201L and a coaxial cable 202L. Here, in the configuration,when the broadcasting signal is transmitted from the antenna 200L to thebroadcast receiving apparatus 100, as illustrated in FIG. 8C, theconverter 201L may subject a frequency conversion amplification processto the broadcasting signal. Namely, in a case where the antenna 200L isinstalled at the roof of an apartment building or the like andtransmission of the broadcasting signal is executed to the broadcastreceiving apparatus 100 of each room by the coaxial cable 202L with along cable length, it is conceivable that the broadcasting signal willbe attenuated, and there is a possibility that a defect that the 4Kbroadcast wave of the lower layer cannot particularly be receivedcorrectly by the tuning/wave detector 131L occurs.

Therefore, in order to prevent the defect described above, the converter201L executes the frequency conversion amplification process for the 4Kbroadcasting signal of the lower layer. In the frequency conversionamplification process, a frequency band of the 4K broadcasting signal ofthe lower layer is converted from a frequency band of 470 to 710 MHz(that is, a band corresponding to 13 ch to 52 ch of the UHF) to afrequency band of 770 to 1010 MHz that exceed a band corresponding to 62ch of the UHF, for example. Moreover, a process of amplifying the 4Kbroadcasting signal of the lower layer to a signal level at which aninfluence of attenuation by the cable does not cause a problem isexecuted. By executing such a process, it also becomes possible to avoidan influence of attenuation of the broadcasting signal during coaxialcable transmission while avoiding interference between the 2Kbroadcasting signal and the 4K broadcasting signal. Note that in a casewhere the influence of attenuation does not cause a problem, such as ina case where the cable length of the coaxial cable 202L is short, theconverter 201L and the frequency conversion amplification process may beunnecessary.

Further, it is preferable that the frequency band after conversion bythe frequency conversion amplification process is between 710 and 1032MHz, which exceeds the band corresponding to 52 ch of the UHF, orbetween 770 and 1032 MHz, which exceeds the band corresponding to 62 chof the UHF, (in case of retransmission by the cable television station);it is preferable that a bandwidth of a range between a frequency bandbefore conversion by the frequency conversion amplification process anda frequency band after conversion is set to be an integral multiple ofthe bandwidth (6 MHz) of one physical channel; and the frequencyconversion amplification process may be executed only for a physicalchannel using signal transmission by the layered division multiplexingtransmission method. Since all of them are similar to those explainedfor the frequency conversion according to the present embodiment, whichhave already been described, repeated explanation thereof is omitted.

Note that the broadcast receiving apparatus 100 according to the presentembodiment can identify whether the received broadcasting signal is thebroadcasting signal transmitted by the lower layer or the broadcastingsignal transmitted by the upper layer by using the upper/lower layeridentification bit of the TMCC information, which has been explainedwith reference to FIG. 5H. Further, the broadcast receiving apparatus100 according to the present embodiment can identify whether thereceived broadcasting signal is a broadcasting signal subjected to thefrequency conversion after reception by the antenna or not by using thefrequency converting process identification bit of the TMCC information,which has been explained with reference to FIG. 5F. Further, thebroadcast receiving apparatus 100 according to the present embodimentcan identify whether a 4K program is transmitted by the lower layer inthe received broadcasting signal or not by using the 4K signaltransmission layer identification bit of the TMCC information, which hasbeen explained with reference to FIG. 5I. It is not impossible toexecute these identifying processes by demodulating a data carrier andreferring to control information contained in a stream. However, it isnecessary to demodulate the data carrier, and this causes the process tobecome complicated. It is more easily and faster to identify them byreferring to the parameters of the TMCC information described above. Forthis reason, it is possible to further speed up the initial scan of thebroadcast receiving apparatus 100, for example.

Note that as explained above, the tuning/wave detector 131L of the thirdtuner/demodulator 130L in the broadcast receiving apparatus 100according to the embodiment of the present invention has the receivingfunction compatible with the LDM (layered division multiplexing)technique. For this reason, the converter 201L illustrated in FIG. 8C isnot always required between the antenna 200L and the broadcast receivingapparatus 100.

Note that as described above, the broadcast wave of the terrestrialdigital broadcasting transmitted by the layered division multiplexingtransmission method explained above can be received and reproduced bythe third tuner/demodulator 130L of the broadcast receiving apparatus100, but can also be received by the first tuner/demodulator 130C of thebroadcast receiving apparatus 100. In a case where the broadcast wave ofthe terrestrial digital broadcasting is received by the firsttuner/demodulator 130C, the broadcasting signal transmitted by the layerfor the transmitted advanced terrestrial digital broadcasting service ofthe broadcasting signals of the broadcast wave of the terrestrialdigital broadcasting is ignored, but the broadcasting signal transmittedby the layer for the existing terrestrial digital broadcasting serviceis reproduced.

[MPEG-2 TS Method]

The broadcasting system according to the present embodiment iscompatible with an MPEG-2 TS, which is adopted in the existingterrestrial digital broadcasting service, as a media transport method oftransmitting data such as video or audio. Specifically, the method ofthe stream transmitted by the OFDM transmission wave illustrated in (1)of FIG. 4D is the MPEG-2 TS, and the method of the stream transmitted bythe layer, by which the existing terrestrial digital broadcastingservice is transmitted, of the OFDM transmission waves illustrated in(2) of FIG. 4D and (3) of FIG. 4D is the MPEG-2 TS. Further, the methodof the stream obtained by demodulating the transmission wave by thefirst tuner/demodulator 130C of the broadcast receiving apparatus 100illustrated in FIG. 2A is the MPEG-2 TS. Further, the method of thestream, which corresponds to the layer by which the existing terrestrialdigital broadcasting service is transmitted, among the streams obtainedby demodulating the transmission wave by the second tuner/demodulator130T is the MPEG-2 TS. Similarly, the method of the stream, whichcorresponds to the layer by which the existing terrestrial digitalbroadcasting service is transmitted, among the streams obtained bydemodulating the transmission wave by the third tuner/demodulator 130Lis the MPEG-2 TS.

The MPEG-2 TS is characterized in that components constituting a programsuch as video or audio is multiplexed into one packet stream togetherwith a control signal and a clock. Since it is treated as one packetstream including the clock, it is suitable to transmit one content viaone transmission path in which transmission quality is secured, and theMPEG-2 TS is adopted in many existing digital broadcasting systems.Further, it is possible to realize bidirectional communication via abidirectional network such as a fixed network/portable network, and itis possible to be compatible with the broadcasting/communicationcooperation system in which a digital broadcasting service is caused tocooperate with a function using a broadband network and acquisition ofadditional content via the broadband network, arithmetic processing by aserver apparatus, and a presenting process in cooperation with portableterminal equipment are combined with the digital broadcasting service.

FIG. 9A illustrates one example of a protocol stack of a transmissionsignal in the broadcasting system using the MPEG-2 TS. In the MPEG-2 TS,PSI, SI, and the other control signals are transmitted by a sectionform.

[Control Signal of Broadcasting System Using MPEG-2 TS Method]

As control information of a MPEG-2 TS method, there are a table mainlyused for program arrangement information and a table used for other thanthe program arrangement information. Each of the tables is transmittedin a section form, and descriptors are arranged in the correspondingtable.

<Tables Used in Program Arrangement Information>

FIG. 9B illustrates a list of tables used in the program arrangementinformation of the broadcasting system of the MPEG-2 TS method. In thepresent embodiment, the following is used as the tables used in theprogram arrangement information.

-   -   (1) PAT (Program Association Table)    -   (2) CAT (Conditional Access Table)    -   (3) PMT (Program Map Table)    -   (4) NIT (Network Information Table)    -   (5) SDT (Service Description Table)    -   (6) BAT (Bouquet Association Table)    -   (7) EIT (Event Information Table)    -   (8) RST (Running Status Table)    -   (9) TDT (Time and Date Table)    -   (10) TOT (Time Offset Table)    -   (11) LIT (Local Event Information Table)    -   (12) ERT (Event Relation Table)    -   (13) ITT (Index Transmission Table)    -   (14) PCAT (Partial Content Announcement Table)    -   (15) ST (Stuffing Table)    -   (16) BIT (Broadcaster Information Table)    -   (17) NBIT (Network Board Information Table)    -   (18) LDT (Linked Description Table)    -   (19) AMT (Address Map Table)    -   (20) INT (IP/MAC Notification Table)    -   (21) table set by provider

<Tables Used in Digital Broadcasting>

FIG. 9C illustrates a list of tables used for other than the programarrangement information of the broadcasting system with the MPEG-2 TSmethod. In the present embodiment, the following is used as the tablesused for other than the program arrangement information.

-   -   (1) ECM (Entitlement Control Message)    -   (2) EMM (Entitlement Management Message)    -   (3) DCT (Download Control Table)    -   (4) DLT (DownLoad Table)    -   (5) DIT (Discontinuity Information Table)    -   (6) SIT (Selection Information Table)    -   (7) SDTT (Software Download Trigger Table)    -   (8) CDT (Common Data Table)    -   (9) DSM-CC section    -   (10) AIT (Application Information Table)    -   (11) DCM (Download Control Message)    -   (12) DMM (Download Management Message)    -   (13) table set by provider

<Descriptors Used in Program Arrangement Information>

FIG. 9D, FIG. 9E, and FIG. 9F illustrate a list of descriptors used inthe program arrangement information of the broadcasting system of theMPEG-2 TS method. In the present embodiment, the following is used asthe descriptors used in the program arrangement information.

-   -   (1) limited reception type descriptor (Conditional Access        Descriptor)    -   (2) copyright descriptor (Copyright Descriptor)    -   (3) network name descriptor (Network Name Descriptor)    -   (4) service list descriptor (Service List Descriptor)    -   (5) stuffing descriptor (Stuffing Descriptor)    -   (6) satellite delivery system descriptor (Satellite Delivery        System Descriptor)    -   (7) terrestrial delivery system descriptor (Terrestrial Delivery        System Descriptor)    -   (8) bouquet name descriptor (Bouquet Name Descriptor)    -   (9) service descriptor (Service Descriptor)    -   (10) country reception availability descriptor (Country        Availability Descriptor)    -   (11) linkage descriptor (Linkage Descriptor)    -   (12) NVOD reference service descriptor (NVOD Reference        Descriptor)    -   (13) time shifted service descriptor (Time Shifted Service        Descriptor)    -   (14) short form event descriptor (Short Event Descriptor)    -   (15) extended form event descriptor (Extended Event Descriptor)    -   (16) time shifted event descriptor (Time Shifted Event        Descriptor)    -   (17) component descriptor (Component Descriptor)    -   (18) mosaic descriptor (Mosaic Descriptor)    -   (19) stream identifier descriptor (Stream Identifier Descriptor)    -   (20) CA identifier descriptor (CA Identifier Descriptor)    -   (21) content descriptor (Content Descriptor)    -   (22) parental rate descriptor (Parental Rating Descriptor)    -   (23) hierarchical transmission descriptor (Hierarchical        Transmission Descriptor)    -   (24) digital copy control descriptor (Digital Copy Control        Descriptor)    -   (25) emergency information descriptor (Emergency Information        Descriptor)    -   (26) data coded method descriptor (Data Component Descriptor)    -   (27) system management descriptor (System Management Descriptor)    -   (28) local time offset descriptor (Local Time Offset Descriptor)    -   (29) audio component descriptor (Audio Component Descriptor)    -   (30) target region descriptor (Target Region Descriptor)    -   (31) hyperlink descriptor (Hyperlink Descriptor)    -   (32) data content descriptor (Data Content Descriptor)    -   (33) video decode control descriptor (Video Decode Control        Descriptor)    -   (34) basic local event descriptor (Basic Local Event Descriptor)    -   (35) reference descriptor (Reference Descriptor)    -   (36) node relation descriptor (Node Relation Descriptor)    -   (37) short form node information descriptor (Short Node        Information Descriptor)    -   (38) STC reference descriptor (STC Reference Descriptor)    -   (39) partial reception descriptor (Partial Reception Descriptor)    -   (40) series descriptor (Series Descriptor)    -   (41) event group descriptor (Event Group Descriptor)    -   (42) SI transmission parameter descriptor (SI Parameter        Descriptor)    -   (43) broadcaster name descriptor (Broadcaster Name Descriptor)    -   (44) component group descriptor (Component Group Descriptor)    -   (45) SI prime TS descriptor (SI Prime TS Descriptor)    -   (46) bulletin board information descriptor (Board Information        Descriptor)    -   (47) LDT linkage descriptor (LDT Linkage Descriptor)    -   (48) connected transmission descriptor (Connected Transmission        Descriptor)    -   (49) TS information descriptor (TS Information Descriptor)    -   (50) extended broadcaster descriptor (Extended Broadcaster        Descriptor)    -   (51) logo transmission descriptor (Logo Transmission 0        Descriptor)    -   (52) content availability descriptor (Content Availability        Descriptor)    -   (53) carousel compatible composite descriptor (Carousel        Compatible Composite Descriptor)    -   (54) limited reproduction method descriptor (Conditional        Playback Descriptor)    -   (55) AVC video descriptor (AVC Video Descriptor)    -   (56) AVC timing HRD descriptor (AVC Timing and HRD Descriptor)    -   (57) service group descriptor (Service Group Descriptor)    -   (58) MPEG-4 audio descriptor (MPEG-4 Audio Descriptor)    -   (59) MPEG-4 audio extension descriptor (MPEG-4 Audio Extension        Descriptor)    -   (60) registration descriptor (Registration Descriptor)    -   (61) data broadcast identification descriptor (Data Broadcast Id        Descriptor)    -   (62) access control descriptor (Access Control Descriptor)    -   (63) area broadcasting information descriptor (Area Broadcasting        Information Descriptor)    -   (64) material information descriptor (Material Information        Descriptor)    -   (65) HEVC video descriptor (HEVC Video Descriptor)    -   (66) hierarchy coded descriptor (Hierarchy Descriptor)    -   (67) communication cooperation information descriptor (Hybrid        Information Descriptor)    -   (68) scramble method descriptor (Scrambler Descriptor)    -   (69) descriptor set by provider

<Descriptors Used in Digital Broadcasting>

FIG. 9G illustrates a list of descriptors used for other than theprogram arrangement information of the broadcasting system of the MPEG-2TS method. In the present embodiment, the following is used as thedescriptors other than the program arrangement information.

-   -   (1) partial transport stream descriptor (Partial Transport        Stream Descriptor)    -   (2) network identification descriptor (Network Identification        Descriptor)    -   (3) partial transport stream time descriptor (Partial Transport        Stream Time Descriptor)    -   (4) download content descriptor (Download Content Descriptor)    -   (5) CA EMM TS descriptor (CA EMM TS Descriptor)    -   (6) CA contract information descriptor (CA Contract Information        Descriptor)    -   (7) CA service descriptor (CA Service Descriptor)    -   (8) carousel identifier descriptor (Carousel Identifier        Descriptor)    -   (9) association tag descriptor (Association Tag Descriptor)    -   (10) extended association tag descriptor (Deferred Association        tags Descriptor)    -   (11) network download content descriptor (Network Download        Content Descriptor)    -   (12) download protection descriptor (Download Protection        Descriptor)    -   (13) CA startup descriptor (CA Startup Descriptor)    -   (14) descriptor set by provider

<Descriptor Used in INT>

FIG. 9H illustrates a list of descriptors used in INT of thebroadcasting system of the MPEG-2 TS method. In the present embodiment,the following is used as the descriptors used in the INT. Note that thedescriptors used in the program arrangement information described aboveand the descriptors used for other than the program arrangementinformation are not used in the INT.

-   -   (1) target smartcard descriptor (Target Smartcard Descriptor)    -   (2) target IP address descriptor (Target IP Address Descriptor)    -   (3) target IPv6 address descriptor (Target IPv6 Address        Descriptor)    -   (4) IP/MAC platform name descriptor (IP/MAC Platform Name        Descriptor)    -   (5) IP/MAC platform provider name descriptor (IP/MAC Platform        Provider Name Descriptor)    -   (6) IP/MAC stream arrangement descriptor (IP/MAC Stream Location        Descriptor)    -   (7) descriptor set by provider

<Descriptors Used in AIT>

FIG. 9I illustrates a list of descriptors used in the AIT of thebroadcasting system of the MPEG-2 TS method. In the present embodiment,the following is used as descriptors used in the AIT. Note that thedescriptors used in the program arrangement information described aboveand the descriptors used for other than the program arrangementinformation are not used in the INT.

-   -   (1) application descriptor (Application Descriptor)    -   (2) transport protocol descriptor (Transport Protocol        Descriptor)    -   (3) simple application location descriptor (Simple Application        Location Descriptor)    -   (4) application boundary authority setting descriptor        (Application Boundary and Permission Descriptor)    -   (5) startup priority information descriptor (Autostart Priority        Descriptor)    -   (6) cache information descriptor (Cache Control Info Descriptor)    -   (7) stochastic application delay descriptor (Randomized Latency        Descriptor)    -   (8) external application control descriptor (External        Application Control Descriptor)    -   (9) video recording and reproducing application descriptor        (Playback Application Descriptor)    -   (10) simple video recording and reproducing application location        descriptor (Simple Playback Application Location Descriptor)    -   (11) application expiration date descriptor (Application        Expiration Descriptor)    -   (12) descriptor set by provider

[MMT Method]

The broadcasting system according to the present embodiment can alsoaddress an MMT method as the media transport method of transmitting datasuch as video or audio. Specifically, the method of the stream to betransmitted by the layer by which the advanced terrestrial digitalbroadcasting service is transmitted in the OFDM transmission waveillustrate in (2) of FIG. 4D and (3) of FIG. 4D is the MMT method inprinciple. Further, the method of the stream corresponding to the layerby which the advanced terrestrial digital broadcasting service istransmitted in the stream obtained by demodulating the transmission waveby the second tuner/demodulator 130T of the broadcast receivingapparatus 100 illustrated in FIG. 2A is an MMT in principle. Similarly,the method of the stream corresponding to the layer by which theadvanced terrestrial digital broadcasting service is transmitted in thestream obtained by demodulating the transmission wave by the thirdtuner/demodulator 130L is the MMT in principle. Note that as amodification example, the stream of the MPEG-2 TS may be operated by theadvanced terrestrial digital broadcasting service. Further, the methodof the stream obtained by demodulating the transmission wave by thefourth tuner/demodulator 130B is the MMT.

The MMT method is a newly formulated media transport method becausefunctions of the MPEG-2 TS method are limited with respect to a changein environment regarding content distribution such as diversification ofcontent in the recent years, diversification of equipment that utilizescontent, diversification of a transmission path for distributingcontent, or diversification of content storage environment.

A code of a video signal and an audio signal of a broadcasting programis an MFU (Media Fragment Unit)/MPU (Media Processing Unit); is put onMMT P (MMT Protocol) payload to be converted into an MMTP packet; and istransmitted by an IP packet. Further, data content and a signal of asubtitle related to the broadcasting program are also in an MFU/MPUform; are put on MMTP payload to be converted into an MMTP packet; andare transmitted by an IP packet.

UDP/IP (User Datagram Protocol/Internet Protocol) is used fortransmission of the MMTP packet in a broadcast transmission path, andthe UDP/IP or TCP/IP (Transmission Control Protocol/Internet Protocol)is used in a communication line. Further, in the broadcast transmissionpath, a TLV multiplex method may be used for efficient transmission ofthe IP packet.

FIG. 10A illustrates a protocol stack of the MMT in the broadcasttransmission path. Further, FIG. 10B illustrates a protocol stack of theMMT in the communication line. In the MMT method, a mechanism fortransmitting two types of control information including MMT-SI andTLV-SI is prepared. The MMT-SI is control information indicating aconfiguration of a broadcasting program. The MMT-SI is formed as acontrol message of the MMT; is put on the MMTP payload to become an MMTPpacket; and is transmitted by the IP packet. The TLV-SI is controlinformation regarding multiplexing of the IP packet, and provideinformation for channel selection and correspondence information betweenan IP address and a service.

[Control Signal of Broadcasting System Using MMT Method]

As described above, in the MMT method, the TLV-SI and the MMT-SI areprepared as the control information. The TLV-SI is configured by a tableand descriptors. The table is transmitted in a section form, and thedescriptors are arranged in the table. The MMT-SI is configured by threelayers including a message that stores the table and the descriptors, atable having an element and an attribute that indicate specificinformation, and a descriptor that indicates more detailed information.

<Tables Used in TLV-SI>

FIG. 10C illustrates a list of tables used in the TLV-SI of thebroadcasting system with the MMT method. In the present embodiment, thefollowing is used as the tables of the TLV-SI.

-   -   (1) network information table for TLV (Network Information Table        for TLV)    -   (2) address map table (Address Map Table)    -   (3) table set by provider

<Descriptors Used in TLV-SI>

FIG. 10D illustrates a list of descriptors used in the TLV-SI of thebroadcasting system with the MMT method. In the present embodiment, thefollowing is used as the descriptors of the TLV-SI.

-   -   (1) service list descriptor (Service List Descriptor)    -   (2) satellite delivery system descriptor (Satellite Delivery        System Descriptor)    -   (3) system management descriptor (System Management Descriptor)    -   (4) network name descriptor (Network Name Descriptor)    -   (5) remote control key descriptor (Remote Control Key        Descriptor)    -   (6) descriptor set by provider

<Message Used in MMT-SI>

FIG. 10E illustrates a list of messages used in the MMT-SI of thebroadcasting system with the MMT method. In the present embodiment, thefollowing is used as the messages of the MMT-SI.

-   -   (1) PA (Package Access) message    -   (2) M2 section message    -   (3) CA message    -   (4) M2 short section message    -   (5) data transmission message    -   (6) message set by provider

<Table Used in MMT-SI>

FIG. 10F illustrates a list of tables used in the MMT-SI of thebroadcasting system with the MMT method. In the present embodiment, thefollowing is used as the tables of the MMT-SI.

-   -   (1) MPT (MMT Package Table)    -   (2) PLT (Package List Table)    -   (3) LCT (Layout Configuration Table)    -   (4) ECM (Entitlement Control Message)    -   (5) EMM (Entitlement Management Message)    -   (6) CAT (MH) (Conditional Access Table (MH))    -   (7) DCM (Download Control Message)    -   (8) DMM (Download Management Message)    -   (9) MH-EIT (MH-Event Information Table)    -   (10) MH-AIT (MH-Application Information Table)    -   (11) MH-BIT (MH-Broadcaster Information Table)    -   (12) MH-SDTT (MH-Software Download Trigger Table)    -   (13) MH-SDT (MH-Service Description Table)    -   (14) TOT (MH-Time Offset Table)    -   (15) MH-CDT (MH-Common Data Table)    -   (16) DDM table (Data Directory Management Table)    -   (17) DAM table (Data Asset Management Table)    -   (18) DCC table (Data Content Configuration Table)    -   (19) EMT (Event Message Table)    -   (20) table set by provider

<Descriptor Used in MMT-SI>

FIG. 10G, FIG. 10H, and FIG. 10I illustrate a list of descriptors usedin the MMT-SI of the broadcasting system with the MMT method. In thepresent embodiment, the following is used as the descriptors of theMMT-SI.

-   -   (1) asset group descriptor (Asset Group Descriptor)    -   (2) event package descriptor (Event Package Descriptor)    -   (3) background color specification descriptor (Background Color        Descriptor)    -   (4) MPU presentation region specification descriptor (MPU        Presentation Region Descriptor)    -   (5) MPU timestamp descriptor (MPU Timestamp Descriptor)    -   (6) dependency descriptor (Dependency Descriptor)    -   (7) access control descriptor (Access Control Descriptor)    -   (8) scramble method descriptor (Scrambler Descriptor)    -   (9) message authentication method descriptor (Message        Authentication Method Descriptor)    -   (10) emergency information descriptor (Emergency Information        Descriptor)    -   (11) MH-MPEG-4 audio descriptor (MH-MPEG-4 Audio Descriptor)    -   (12) MH-MPEG-4 audio extension descriptor (MH-MPEG-4 Audio        Extension Descriptor)    -   (13) MH-HEVC descriptor (MH-HEVC Descriptor)    -   (14) MH-linkage descriptor (MH-Linkage Descriptor)    -   (15) MH-event group descriptor (MH-Event Group Descriptor)    -   (16) MH-service list descriptor (MH-Service List Descriptor)    -   (17) MH-short form event descriptor (MH-Short Event Descriptor)    -   (18) MH-extended form event descriptor (MH-Extended Event        Descriptor)    -   (19) video component descriptor (Video Component Descriptor)    -   (20) MH-stream identifier descriptor (MH-Stream Identifier        Descriptor)    -   (21) MH-content descriptor (MH-Content Descriptor)    -   (22) MH-parental rate descriptor (MH-Parental Rating Descriptor)    -   (23) MH-audio component descriptor (MH-Audio Component        Descriptor)    -   (24) MH-target region descriptor (MH-Target Region Descriptor)    -   (25) MH-series descriptor (MH-Series Descriptor)    -   (26) MH-SI transmission parameter descriptor (MH-SI Parameter        Descriptor)    -   (27) MH-broadcaster name descriptor (MH-Broadcaster Name        Descriptor)    -   (28) MH-service descriptor (MH-Service Descriptor)    -   (29) IP data flow descriptor (IP Data Flow Descriptor)    -   (30) MH-CA startup descriptor (MH-CA Startup Descriptor)    -   (31) MH-Type descriptor (MH-Type Descriptor)    -   (32) MH-Info descriptor (MH-Info Descriptor)    -   (33) MH-Expire descriptor (MH-Expire Descriptor)    -   (34) MH-Compression Type descriptor (MH-Compression Type        Descriptor)    -   (35) MH-data coding method descriptor (MH-Data Component        Descriptor)    -   (36) UTC-NPT reference descriptor (UTC-NPT Reference Descriptor)    -   (37) event message descriptor (Event Message Descriptor)    -   (38) MH-local time offset descriptor (MH-Local Time Offset        Descriptor)    -   (39) MH-component group descriptor (MH-Component Group        Descriptor)    -   (40) MH-logo transmission descriptor (MH-Logo Transmission        Descriptor)    -   (41) MPU extended timestamp descriptor (MPU Extended Timestamp        Descriptor)    -   (42) MPU download content descriptor (MPU Download Content        Descriptor)    -   (43) MH-network download content descriptor (MH-Network Download        Content Descriptor)    -   (44) MH-application descriptor (MH-Application Descriptor)    -   (45) MH-transport protocol descriptor (MH-Transport Protocol        Descriptor)    -   (46) MH-simple application location descriptor (MH-Simple        Application Location Descriptor)    -   (47) MH-application boundary authority setting descriptor        (MH-Application Boundary and Permission Descriptor)    -   (48) MH-startup priority information descriptor (MH-Autostart        Priority Descriptor)    -   (49) MH-cache information descriptor (MH-Cache Control Info        Descriptor)    -   (50) MH-stochastic application delay descriptor (MH-Randomized        Latency Descriptor)    -   (51) linked PU descriptor (Linked PU Descriptor)    -   (52) locked cache specification descriptor (Locked Cache        Descriptor)    -   (53) unlocked cache specification descriptor (Unlocked Cache        Descriptor)    -   (54) MH-download protection descriptor (MH-DL Protection        Descriptor)    -   (55) application service descriptor (Application Service        Descriptor)    -   (56) MPU node descriptor (MPU Node Descriptor)    -   (57) PU structure descriptor (PU Structure Descriptor)    -   (58) MH-hierarchy coding descriptor (MH-Hierarchy Descriptor)    -   (59) content copy control descriptor (Content Copy Control        Descriptor)    -   (60) content usage control descriptor (Content Usage Control        Descriptor)    -   (61) emergency news descriptor (Emergency News Descriptor)    -   (62) MH-CA contract information descriptor (MH-CA Contract Info        Descriptor)    -   (63) MH-CA service descriptor (MH-CA Service Descriptor)    -   (64) MH-external application control descriptor (MH-External        Application Control Descriptor)    -   (65) MH-video recording and reproducing application descriptor        (MH-Playback Application Descriptor)    -   (66) MH-simple video recording and reproducing application        location descriptor (MH-Simple Playback Application Location        Descriptor)    -   (67) MH-application expiration date descriptor (MH-Application        Expiration Descriptor)    -   (68) related broadcaster descriptor (Related Broadcaster        Descriptor)    -   (69) multimedia service information descriptor (Multimedia        Service Descriptor)    -   (70) descriptor set by provider

<Relation Between Data Transmission and Each Control Information in MMTMethod>

FIG. 10J illustrates a relation between data transmission andrepresentative tables in the broadcasting system of the MMT method.

In the broadcasting system of the MMT method, data transmission can beexecuted via a plurality of routes such as the TLV stream via thebroadcast transmission path or an IP data flow via the communicationline. The TLV-SI such as a TLV-NIT or an AMT and the IP data flow thatis a data flow of the IP packet are contained in the TLV stream. A videoasset including a series of video MPUs and an audio asset including aseries of audio MPUs are contained in the IP data flow. Moreover, any ofa subtitle asset including a series of subtitle MPUs, a caption assetincluding a series of caption MPUs, and a data asset including a seriesof data MPUs may be contained therein. Various kinds of assets areassociated with each other for package unit by an MPT (an MMT packagetable) stored in a PA message and to be transmitted. Specifically, apackage ID and an asset ID of each asset included in a package may bedescribed in the MPT so as to be associated with each other.

The assets constituting the package can be only the assets in the TLVstream. However, as illustrated in FIG. 10J, the assets to betransmitted by the IP data flow of the communication line can also beincluded. This can be realized by containing location information ofeach asset included in the package in the MPT so that the broadcastreceiving apparatus 100 can grasp a reference destination of each asset.As the location information of each asset, it is possible to specifyvarious kinds of data to be transmitted by various transmission routesas follows:

-   -   (1) data multiplexed into the same IP data flow as the MPT    -   (2) data multiplexed into an IPv4 data flow    -   (3) data multiplexed into an IPv6 data flow    -   (4) data multiplexed into MPEG2-TS of broadcast    -   (5) data multiplexed into the IP data flow in an MPEG2-TS form    -   (6) data at a specified URL.

The broadcasting system with the MMT method further has a concept of anevent. The event is a concept indicating a so-called program, which istreated by an MH-EIT that is transmitted while being included in an M2section message. Specifically, in a package indicated by an eventpackage descriptor stored in the MH-EIT, a series of data included in aperiod for a duration time from a disclosure time stored in the MH-EITis data contained in the concept of the event. The MH-EIT can be usedfor various kinds of processes (for example, a generating process for aprogram guide, a control of video recording reservation or timerrecording, a copyright management process such as temporary storage, andthe like) for event unit in the broadcast receiving apparatus 100.

[Channel Setting Process of Broadcast Receiving Apparatus]

<Initial Scan>

In the existing terrestrial digital broadcasting, the network ID isdifferent for sending master unit, and it is general that information ofthe other stations is not described in an NIT. Therefore, with respectto the terrestrial digital broadcasting according to the embodiment ofthe present invention (advanced terrestrial digital broadcast orterrestrial digital broadcast in which the advanced terrestrial digitalbroadcasting and the existing terrestrial digital broadcasting aretransmitted by the other layers at the same time), it is necessary forthe broadcast receiving apparatus 100 according to the embodiment of thepresent invention, which has compatibility with the existing terrestrialdigital broadcasting to have a function to search (or scan) allreceivable channels at a reception spot and create a service list (thatis, a receivable frequency table) based on a service ID. Note that inregions where the same network ID can be received on different physicalchannels by an MFN (Multi Frequency Network: multi frequency network),the broadcast receiving apparatus 100 may basically operate so as toselect a channel with a good reception C/N or a good BER (Bit ErrorRate) and store it in the service list.

Note that in the advanced BS digital broadcasting or the advanced CSdigital broadcasting received by the fourth tuner/demodulator 130B ofthe broadcast receiving apparatus 100 according to the embodiment of thepresent invention, the broadcast receiving apparatus 100 may obtain andstore the service list to be stored in the TLV-NIT, and it is thusunnecessary to create the service list. Therefore, the initial scan andrescan (will be described later) are not required for the advanced BSdigital broadcasting or the advanced CS digital broadcasting received bythe fourth tuner/demodulator 130B.

<Rescan>

The broadcast receiving apparatus 100 according to the embodiment of thepresent invention has a rescan function prepared for a case of open of anew station, installation of a new relay station, or change in areception spot of a television receiver. In a case where informationthat has already been set is to be changed, the broadcast receivingapparatus 100 can notify the user of that effect.

<Operation Example at Time of Initial/Rescan>

FIG. 11A illustrates one example of an operation sequence of a channelsetting process (initial/rescan) by the broadcast receiving apparatus100 according to the embodiment of the present invention. Note that inFIG. 11A, an example of a case where the MPEG-2 TS is adopted as themedia transport method is illustrated, but it also becomes the similarprocess basically even in a case where the MMT method is adopted.

In the channel setting process, the receiving function controller 1102first executes setting of a resident region (selection of a region wherethe broadcast receiving apparatus 100 is installed) on the basis of aninstruction of the user (S101). At this time, in place of theinstruction of the user, the setting of the resident region may beexecuted automatically on the basis of installation location informationof the broadcast receiving apparatus 100, which is obtained by apredetermined process. As an example of an obtaining process of theinstallation location information, such information may be obtained froma network to which the LAN communication unit 121 is connected, orinformation regarding an installation location may be obtained fromexternal equipment to which the digital interface 125 is connected.Next, an initial value of a frequency range to be scanned is set, and atuner/demodulator (described in this manner in a case where the firsttuner/demodulator 130C, the second tuner/demodulator 130T, and the thirdtuner/demodulator 130L are not distinguished. the same applieshereinafter.) is instructed so as to execute tuning to the set frequency(S102).

The tuner/demodulator executes the tuning on the basis of theinstruction (S103). In a case where the lock to the set frequency issuccessful (S103: Yes), the processing flow proceeds to a process atS104. In a case where the lock is not successful (S103: No), theprocessing flow proceeds to a process at S111. In the process at S104,confirmation of a C/N is executed (S104). In a case where apredetermined number of C/N or more is obtained (S104: Yes), theprocessing flow proceeds to a process at S105, and a receptionconfirming process is executed. In a case where the predetermined numberof C/N or more is not obtained (S104: No), the processing flow proceedsto a process at S111.

In the reception confirming process, the receiving function controller1102 first obtains a BER of the received broadcast wave (S105). Next, anNIT is obtained and collated, whereby it is confirmed whether the NIT iseffective data or not (S106). In a case where the NIT obtained in theprocess at S106 is effective data, the receiving function controller1102 obtains, from the NIT, information such as a transport stream ID oran original network ID. Further, the receiving function controller 1102obtains, from a terrestrial delivery system descriptor, delivery systeminformation regarding a physical condition of a broadcast transmissionpath corresponding to each transport stream ID/original network ID.Further, the receiving function controller 1102 obtains a list ofservice IDs from a service list descriptor.

Next, by confirming the service list stored in the receiving apparatus,the receiving function controller 1102 confirms whether the transportstream ID obtained in the process at S106 has already been obtained ornot (S107). In a case where the transport stream ID obtained in theprocess at S106 has not already been obtained (S107: No), the receivingfunction controller 1102 adds the various kinds of information obtainedin the process at S106 to the service list so as to be associated withthe transport stream ID (S108). In a case where the transport stream IDobtained in the process at S106 has already been obtained (S107: Yes),the receiving function controller 1102 compares the BER obtained in theprocess at S105 with the BER when the transport stream ID, which hasbeen described in the service list, is obtained (S109). As a result, ina case where the BER obtained in the process at S105 is better (S109:Yes), the receiving function controller 1102 updates the service list onthe basis of the various kinds of information obtained in the process atS106 (S110). In a case where the BER obtained in the process at S105 isnot better (S109: No), the receiving function controller 1102 discardsthe various kinds of information obtained in the process at S106.

Further, at the time of the service list creating (adding/updating)process described above, a remote controller key ID may be obtained froma TS information descriptor, and a representative service for eachtransport stream may be associated with the remote controller key. Bythis process, it becomes possible to execute one-touch channel selection(will be described later).

When the reception confirming process is terminated, the receivingfunction controller 1102 confirms whether a current frequency setting isa final value in the frequency range to be scanned or not (S111). In acase where the current frequency setting is not the final value in thefrequency range to be scanned (S111: No), the receiving functioncontroller 1102 increases the frequency value set to thetuner/demodulator (S112), and repeats the processes at S103 to S110. Ina case where the current frequency setting is the final value in thefrequency range to be scanned (S111: Yes), the processing flow proceedsto a process at S113.

In the process at S113, the service list created (or added or updated)in the processes described above is presented to the user as a result ofthe channel setting process (S113). Further, in a case where there isoverlap of the remote controller keys, the user may be informed of thateffect to encourage the user to change the setting for the remotecontroller key (S114). The service list created or updated in theprocesses described above is stored in the ROM 103 of the broadcastreceiving apparatus 100 or a non-volatile memory such as the storage(accumulator) 110.

FIG. 11B illustrates one example of a data structure of the NIT. In FIG.11B, “transpotrt_stream_id” corresponds to the transport stream IDdescribed above, and “original_network_id” corresponds to the originalnetwork ID. Further, FIG. 11C illustrates one example of a datastructure of the terrestrial delivery system descriptor. In FIG. 11C,“guard_interval”, “transmission_mode”, “frequency”, and the likecorrespond to the delivery system information described above. FIG. 11Dillustrates one example of a data structure of the service listdescriptor. In FIG. 11D, “service_id” corresponds to the service IDdescribed above. FIG. 11E illustrates one example of a data structure ofthe TS information descriptor. In FIG. 11E, “remote_control_key_id”corresponds to the remote controller key ID described above.

Note that the broadcast receiving apparatus 100 may control thereceiving function controller 1102 so as to appropriately change thefrequency range to be scanned described above in accordance with abroadcasting service to be received. For example, in a case where thebroadcast receiving apparatus 100 receives the broadcast wave of theexisting terrestrial digital broadcasting service, the broadcastreceiving apparatus 100 controls the receiving function controller 1102so as to scan a frequency range of 470 to 770 MHz (corresponding to 13ch to 62 ch of the physical channel). Namely, the broadcast receivingapparatus 100 sets an initial value of the frequency range to 470 to 476MHz (central frequency: 473 MHz); sets a final value of the frequencyrange to 764 to 770 MHz (central frequency: 767 MHz); and controls thereceiving function controller 1102 so as to increase the frequency valueby +6 MHz in the process at S112.

Further, in a case where the broadcast receiving apparatus 100 receivesthe broadcast wave including the advanced terrestrial digitalbroadcasting service, the broadcast receiving apparatus 100 controls thereceiving function controller 1102 so as to scan a frequency range of470 to 1010 MHz (because there is a possibility that the frequencyconverting process illustrated in FIG. 7D or the frequency conversionamplification process illustrated in FIG. 8C is executed). Namely, thebroadcast receiving apparatus 100 sets an initial value of the frequencyrange to 470 to 476 MHz (central frequency: 473 MHz); sets a final valueof the frequency range to 1004 to 1010 MHz (central frequency: 1007MHz); and controls serviced the receiving function controller 1102 so asto increase the frequency value by +6 MHz in the process at S112. Notethat even in a case where the broadcast receiving apparatus 100 receivesthe advanced terrestrial digital broadcasting service but it isdetermined that the frequency converting process or the frequencyconversion amplification process described above is not executed, thebroadcast receiving apparatus 100 may control the receiving functioncontroller 1102 so as to scan only the frequency range of 470 to 770MHz. The broadcast receiving apparatus 100 can execute a selectioncontrol of the frequency range to be scanned on the basis of the systemidentification of the TMCC information, the frequency converting processidentification, and the like.

Further, in a case where the broadcasting system according to theembodiment of the present invention has the configuration illustrated inFIG. 7C, for example, and the broadcast receiving apparatus 100 receivesthe advanced terrestrial digital broadcasting service of thedual-polarized transmission method, one of the tuning/wave detector 131Hand the tuning/wave detector 131V may scan the frequency range of 470 to770 MHz, and the other may scan the frequency range of 770 to 1010 MHz(in a case where the frequency converting process is applied to thetransmission wave by the polarized wave detected by the othertuning/wave detector). By controlling it in this manner on the basis ofthe system identification of the TMCC information and the frequencyconverting process identification, it is possible to omit scanning in anunnecessary frequency range, and this makes it possible to reduce thetime required for channel setting. Moreover, in this case, both thetuning/wave detector 131H and the tuning/wave detector 131V may causethe operation sequence illustrated in FIG. 11A to proceed in parallel tosynchronize the loop of frequency increase at S112 in the operationsequence illustrated in FIG. 11A. At this time, in the loop of the sametiming in the loop of the frequency increase in the operation sequenceillustrated in FIG. 11A, in a case where the broadcast receivingapparatus 100 is configured so as to receive a pair of the horizontalpolarized signal and the vertical polarized signal transmitted by thesame physical channel in parallel, it becomes possible to decode thecontrol information inside the packet stream of the advanced terrestrialdigital service to be transmitted by the pair of the horizontalpolarized signal and the vertical polarized signal to obtain the decodedcontrol information during the loop process. This is preferable becausethe scanning and the creation of the service list proceed efficiently.

Similarly, in a case where the broadcast receiving apparatus 100 furtherhas a configuration of so-called double tuners in which a plurality oftuners/demodulators (tuning/wave detectors) is provided (for example, aconfiguration in which a plurality of third tuner/demodulators 130L isprovided) in addition to the configuration illustrated in FIG. 8B andthe broadcast receiving apparatus 100 receives the advanced terrestrialdigital broadcasting service of the layered division multiplexingtransmission method, one of the double tuners may scan the frequencyrange of 470 to 770 MHz, and the other may scan the frequency range of770 to 1010 MHz (in a case where the frequency conversion amplificationprocess is applied thereto). By controlling it in this manner, itbecomes possible to reduce the time required for the channel setting inthe similar manner to the above.

Note that as explained with reference to FIG. 8A, FIG. 8B, and FIG. 8C,the terrestrial digital broadcasting service transmitted by any one ofthe upper layer and the lower layer in the configuration illustrated inFIG. 8B is the existing terrestrial digital broadcasting service.Therefore, for example, the first tuner/demodulator 130C may scan thefrequency range in which the existing terrestrial digital broadcastingservice is transmitted of the frequency range of 470 to 770 MHz and thefrequency range of 770 to 1010 MHz, and the third tuner/demodulator 130Lmay scan the other frequency range I parallel. In this case, it is alsopossible to reduce the time required for the channel setting in thesimilar manner to the parallel scanning by the double tuners of thethird tuner/demodulator 130L described above. It is possible to identifywhether the existing terrestrial digital broadcasting service istransmitted in any of the frequency range of 470 to 770 MHz and thefrequency range of 770 to 1010 MHz and whether the advanced terrestrialdigital broadcasting service is transmitted in any of the frequencyrange of 470 to 770 MHz and the frequency range of 770 to 1010 MHz byreceiving total two points of one point from each frequency range, forexample, two points of 470 to 476 MHz (central frequency: 473 MHz) and770 to 776 MHz (central frequency: 773 MHz) before the operationsequence for the initial scan/rescan is started by means of the thirdtuner/demodulator 130L, obtaining the TMCC information transmitted ateach frequency, and referring to the parameters stored in the TMCCinformation (for example, the parameter of the system identification).

Note that in case of a channel that has a broadcasting program to betransmitted by using both the horizontal polarized signal and thevertical polarized signal like the 4K broadcasting program of the Clayer illustrated in the hierarchical division example of (1) of FIG.7A, for example, in the advanced terrestrial digital broadcastingservice of the dual-polarized transmission method, the same transport IDis detected by scanning both the frequency range of 470 to 770 MHz andthe frequency range of 770 to 1010 MHz. However, this is described inthe service list as one channel. Further, in a case where the samebroadcasting program is transmitted by the B layer of the horizontalpolarized signal and the B layer of the vertical polarized signal in the2K broadcasting program of the B layer illustrated in (1) of FIG. 7A, itmay be stored in the service list as one channel even though the sametransport ID is detected. Namely, in a case where the same broadcastingprogram is transmitted in the same layer transmitted by a differentpolarized wave, they are merged into one channel and recognized, and arenot recognized as different channels. By configuring it in this manner,it is possible to avoid the user from being confused due to existence ofexactly the same broadcasting program in the different channels in thechannel selecting process using the service list.

On the other hand, in a case where different broadcasting programs aretransmitted between the B layer of the horizontal polarized signal andthe B layer of the vertical polarized signal in the advanced terrestrialdigital broadcasting service of the dual-polarized transmission method(in a case where the B layer of the vertical polarized signal is treatedas the virtual D layer), they are stored in the service list asdifferent channels. It is possible to identify whether the samebroadcasting program is transmitted by the B layer of the horizontalpolarized signal and the B layer of the vertical polarized signal or notby referring to the additional layer transmission identificationparameter of the TMCC information and determining such a manner by meansof the broadcast receiving apparatus 100.

[Channel Selecting Process of Broadcast Receiving Apparatus]

The broadcast receiving apparatus 100 according to the embodiment of thepresent invention has, as a program selecting function, functions suchas one-touch channel selection by a one-touch key of a remotecontroller, channel up/down selection by a channel up/down key of theremote controller, or direct channel selection by a direct input of atriple-digit number using ten keys of the remote controller. Any channelselecting function may be executed by using information stored in theservice list generated by the initial scan/rescan described above.Further, after channel selection, information on the selected channel (atriple-digit number used for direct channel selection, a branch number,a TS name, a service name, a logo, video resolution information(distinguishing among UHD, HD, and SD), presence or absence of videoresolution up/down conversion, the number of audio channels, presence orabsence of audio downmix, and the like) is displayed by a banner displayor the like. By configuring it in this manner, the user visually obtainsinformation of the channel after channel selection, and confirm whetherthe channel can be selected to a desired channel or not. Hereinafter,one example of a process in each channel selecting method is described.

<Process Example of One-Touch Channel Selection>

-   -   (1) A service of “service_id” specified by        “remote_control_key_id” is selected by pressing the one-touch        key of the remote controller.    -   (2) A last mode is set, and channel information display after        channel selection is executed.

<Process Example of Up/Down Channel Selection by Channel Up/Down Button>

-   -   (1) Channel selection is executed in the order of the        triple-digit number using the direct channel selection by        pressing the channel up/down key of the remote controller.    -   (1-1) In a case where an up key is pressed, a service adjacent        to an upper side of the triple-digit number is selected.        However, in a case where a value of a current triple-digit        number is the maximum value in the service list, a service with        a number of the minimum value is selected.    -   (1-2) In a case where a down key is pressed, a service adjacent        to a lower side of the triple-digit number is selected. However,        in a case where a value of a current triple-digit number is the        minimum value of the service list, a service with a number of        the maximum value is selected.    -   (2) A last mode is set, and channel information display after        channel selection is executed.

<Process Example of Direct Channel Selection>

-   -   (1) When direct channel selection is selected, it becomes a        state of waiting for an input of triple-digit number.    -   (2-1) In a case where the input of the triple-digit number is        not completed within a predetermined time (about five seconds),        the mode is returned to a normal mode, and channel information        display of the currently selected service is executed.    -   (2-2) In a case where an input of a triple-digit number is        completed, it is determined whether the channel exists in the        service list of a receivable frequency table or not. In a case        where there is no channel, a message such as “this channel does        not exist” is displayed.    -   (3) In a case where the channel exists, a channel selecting        process is executed, a last mode is set, and channel information        display after channel selection is executed.

Note that the channel selection operation is executed on the basis ofSI, and the broadcast receiving apparatus 100 may also have a functionto inform the user of that effect by displaying the same in a case whereit is determined that the broadcast is suspended.

<Remote Controller of Broadcast Receiving Apparatus>

FIG. 12A illustrates one example of an appearance view of the remotecontroller (remote controller) used for inputting an operationinstruction to the broadcast receiving apparatus 100 according to theembodiment of the present invention.

A remote controller 180R includes a power source key 180R1 for turningon/off (standby on/off) of a power source of the broadcast receivingapparatus 100, a cursor key (up, down, left, and right) 180R2 for movinga cursor up, down, right, and left, a determination key 180R3 fordetermining an item of a cursor position as a selection item, and areturn key 180R4.

Further, the remote controller 180R also includes a network switchingkey (advanced terrestrial digital, terrestrial digital, advanced BS, BS,and CS) 180R5 for switching a broadcasting network received by thebroadcast receiving apparatus 100. Further, the remote controller 180Ralso includes one-touch keys (1 to 12) 180R6 used for one-touch channelselection, a channel up/down key 180R7 used for channel selection bychannel up/down, and ten keys used for inputting a triple-digit numberat the time of direct channel selection. Note that in the exampleillustrated in FIG. 12A, the ten keys are also used as the one-touch key180R6, and a triple-digit number can be inputted by operating theone-touch key 180R6 after pressing a direct key 180R8 at the time ofdirect channel selection.

Further, the remote controller 180R also includes an EPG key 180R9 fordisplaying a program guide and a menu key 180RA for displaying a systemmenu. The program guide and the system menu can be operated in detail byany of the cursor key 180R2, the determination key 180R3, and the returnkey 180R4.

Further, the remote controller 180R also includes a d key 180RB used fora data broadcasting service or a multimedia service, a cooperation key180RC for displaying a broadcasting/communication cooperation serviceand a list of corresponding applications, and a color key (blue, red,green, and yellow) 180RD. In each of the data broadcasting service, themultimedia service, and the broadcasting/communication cooperationservice, detailed operations can be carried out by using any of thecursor key 180R2, the determination key 180R3, the return key 180R4, andthe color key 180RD.

Further, the remote controller 180R also includes a video key 180RE forselecting related video, an audio key 180RF for switching of audio ES orswitching of two languages, and a subtitle key 180RG for switching ofon/off of a subtitle or switching of a subtitle language. Further, theremote controller 180R also includes a volume key 180RH for increasingor decreasing volume of audio output, and a mute key 180RI for switchingon/off of the audio output.

<Process Example of Network Switching by Advanced Terrestrial DigitalKey>

The remote controller 180R of the broadcast receiving apparatus 100according to the embodiment of the present invention includes an“advanced terrestrial digital key”, a “terrestrial digital key”, an“advanced BS key”, a “BS key”, and a “CS key” as the network switchingkey 180R5. Here, with respect to the “advanced terrestrial digital key”and the “terrestrial digital key”, the broadcast receiving apparatus 100may be configured so that in the advanced terrestrial digitalbroadcasting service, for example, in a case where the simultaneousbroadcasting of a 4K broadcasting program and a 2K broadcasting programby different layers is conducted, selection of the 4K broadcastingprogram is prioritized at the time of channel selection in a state wherethe “advanced terrestrial digital key” is pressed; and selection of the2K broadcasting program is prioritized at the time of channel selectionin a state where the “terrestrial digital key” is pressed. Bycontrolling the broadcast receiving apparatus 100 in this manner, in acase where there are many errors in the transmission wave of the 4Kbroadcasting program in a situation where the 4K broadcasting programcan be received, for example, it becomes possible to control thebroadcast receiving apparatus 100 so that the 2K broadcasting programcan be selected forcibly by pressing the “terrestrial digital key”.

<Screen Display Example at Time of Channel Selection>

As described above, the broadcast receiving apparatus 100 according tothe embodiment of the present invention has a function to displayinformation on selected channel by a banner display or the like whenchannel selection by the one-touch channel selection, the channelup/down selection, or the direct channel selection is executed.

FIG. 12B illustrates one example of the banner display at the time ofchannel selection. A banner display 192A1 is an example of a bannerdisplay that is displayed when a 2K broadcasting program is selected.For example, a program name, a start time and an end time of a program,a network type, a number of a direct channel selection key of a remotecontroller, a service logo, and a triple-digit number may be displayed.Further, a banner display 192A2 is an example of a banner display thatis displayed when a 4K broadcasting program is selected. For example, inaddition to similar information as those of the banner display 192A1described above, a mark symbolizing “advanced”, which indicates that aprogram being receives is a 4K broadcasting program, is furtherdisplayed. Further, in a case where a resolution converting process or adownmixing process is executed, a display indicating that effect may beexecuted. In the example of the banner display 192A2, as one example, itis displayed that the down-converting process from UHD resolution to HDresolution and the downmixing process from 22.2 ch to 5.1 ch have beenexecuted.

In the broadcast receiving apparatus 100, by executing these displays,in a case where the same content is broadcast as broadcasting programswith different quality such as a 2K broadcasting program or a 4Kbroadcasting program at the same time by the simultaneous broadcastingor the like, the user can suitably grasp which broadcasting program isdisplayed.

According to the system of the advanced digital broadcasting service,which includes a part or all of the functions of each function accordingto the embodiment of the present invention described above, it becomespossible to provide a transmission technique and a reception techniquefor an advanced digital broadcasting service with higher functionalityin consideration of compatibility with an existing digital broadcastingservice. Namely, it is possible to provide a technique for more suitablytransmitting or receiving the advanced digital broadcasting service.

As described above, the examples of the embodiment according to thepresent invention have been described. However, the configuration forrealizing the techniques according to the present invention is notlimited to the embodiment, and various modification examples can beconsidered. For example, a part of the configuration of one embodimentcan be replaced by the configuration of the other embodiment, and thecondition of one embodiment can also be added to the configuration ofthe other embodiment. All of these belong to the scope of the presentinvention. Further, numerical values or messages appearing in thespecification and the drawings are merely one example, and the effectsof the present invention may not be impaired even though different onesare used.

The functions of the present invention described above may be realizedby hardware, for example, by designing a part or all of them by anintegrated circuit. Further, a microprocessor unit or the likeinterprets and executes operating programs for realizing the respectivefunctions, whereby the functions may be realized by software. Hardwareand software may be used together.

Note that the broadcast receiving apparatus 100 may become a state wherethe software for controlling the broadcast receiving apparatus 100 isstored in at least one of the ROM 103 or the storage 110 of thebroadcast receiving apparatus 100 in advance at the time of productshipment. The broadcast receiving apparatus 100 may be configured so asto obtain the software from the other application server on Internet 800via the LAN communication unit 121 after the product shipment. Further,the broadcast receiving apparatus 100 may obtain the software stored ina memory card or an optical disc via the extension interface 124.Similarly, the portable information terminal 700 become a state wherethe software for controlling the portable information terminal 700 isstored in at least one of a ROM or a storage of the portable informationterminal 700 in advance at the time of product shipment. The portableinformation terminal 700 may be configured so as to obtain the softwarefrom the other application server on the Internet 800 via a LANcommunication unit or a mobile phone network communication unit of theportable information terminal 700 after the product shipment. Further,the portable information terminal 700 may obtain the software stored ina memory card or an optical disc via an extension interface of theportable information terminal 700.

Further, the control lines and the information lines illustrated in thedrawings indicate what are considered necessary for explanation thereof,and do not necessarily indicate all of the control lines and theinformation lines on a product. In fact, it may be considered thatalmost all configurations are connected mutually.

REFERENCE SINGS LIST

100: broadcast receiving apparatus, 101: main controller, 102: systembus, 103: ROM, 104: RAM, 110: storage (accumulator), 121: LANcommunication unit, 124: extension interface, 125: digital interface,130C, 130T, 130L, 130B: tuner/demodulator, 140S, 140U: decoder, 180:operation input unit, 191: video selector, 192: monitor, 193: videooutput unit, 194: audio selector, 195: speaker, 196: audio output unit,180R: remote controller, 200, 200T, 200L, 200B: antenna, 300, 300T,300L: radio tower, 400C: headend of cable television station, 400:broadcast station server, 500: service provider server, 600: mobilephone communication server, 600B: base station, 700: portableinformation terminal, 800: the Internet, 800R: router device.

1. A broadcast receiving apparatus comprising: a tuner/demodulatorconfigured to receive a plurality of different transmission wavesrespectively transmitted in a plurality of different polarizationdirections in an air, and generate a stream by executing a demodulatingprocess using a pair of transmission waves among the plurality ofdifferent transmission waves; and a controller, wherein the controlleris configured to identify the pair of transmission waves used for thedemodulating process in accordance with first identification informationcontained in each of the transmission waves received by thetuner/demodulator, and wherein the controller is configured to identifya first transmission wave of the pair of transmission waves used for thedemodulating process and a second transmission wave of the pair oftransmission waves used for the demodulating process, in accordance withsecond identification information contained in each of the transmissionwaves received by the tuner/demodulator, the first transmission wavebeing transmitted in a main polarization direction, the secondtransmission wave being transmitted in a sub polarization direction. 2.The broadcast receiving apparatus according to claim 1, wherein thefirst identification information and the second identificationinformation are stored in a carrier that is modulated differently from adata carrier in the corresponding transmission wave received by thetuner/demodulator.
 3. The broadcast receiving apparatus according toclaim 1, wherein each of the plurality of different transmission wavehas a predetermined bandwidth divided into a predetermined number ofsegments, and wherein in the demodulating process, the stream isgenerated on a basis of a part of the segments included in the firsttransmission wave of the pair of transmission waves and a part of thesegments included in the second transmission wave of the pair oftransmission waves.
 4. A reception processing method of a transmissionwave of digital broadcasting, the reception processing methodcomprising: a receiving step of receiving a plurality of differenttransmission waves transmitted in a plurality of different polarizationdirections; and a demodulating step of demodulating the transmissionwaves received in the receiving step to generate a stream, wherein firstidentification information and second identification information arestored in the plurality of different transmission waves, the firstidentification information allowing a pair of transmission waves of theplurality of different transmission waves to be identified, the secondidentification information allowing a first transmission wave of thepair of transmission waves and a second transmission wave of the pair oftransmission waves to be identified, the first transmission wave beingtransmitted in a main polarization direction, the second transmissionwave being transmitted in a sub polarization direction, the pair oftransmission waves, the first transmission wave and the secondtransmission wave being necessary to generate the stream in thedemodulating step.
 5. The reception processing method of a transmissionwave according to claim 4, wherein the first identification informationand the second identification information are stored in a carrier thatis modulated differently from a data carrier in the plurality ofdifferent transmission waves.
 6. The reception processing method of atransmission wave according to claim 4, wherein each of the plurality ofdifferent transmission waves has a predetermined bandwidth divided intoa predetermined number of segments, and wherein in the demodulatingstep, the stream is generated on a basis of a part of the segmentsincluded in the first transmission wave of the pair of transmissionwaves and a part of the segments included in the second transmissionwave of the pair of transmission waves.